46 datasets found
  1. a

    NGS Benchmarks

    • hub.arcgis.com
    • opendata-volusiacountyfl.hub.arcgis.com
    Updated Aug 5, 2024
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    County of Volusia (2024). NGS Benchmarks [Dataset]. https://hub.arcgis.com/maps/VolusiaCountyFL::ngs-benchmarks
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    Dataset updated
    Aug 5, 2024
    Dataset authored and provided by
    County of Volusia
    Area covered
    Description

    This data is a subset of the original National Geodetic Survey (NGS) data that includes only locations within Volusia County, FL.This data contains a set of geodetic control stations maintained by the National Geodetic Survey. Each geodetic control station in this dataset has either a precise Latitude/Longitude used for horizontal control or a precise Orthometric Height used for vertical control, or both.The National Geodetic Survey (NGS) serves as the Nation's depository for geodetic data. The NGS distributes geodetic data worldwide to a variety of users. These geodetic data include the final results of geodetic surveys, software programs to format, compute, verify, and adjust original survey observations or to convert values from one geodetic datum to another, and publications that describe how to obtain and use Geodetic Data products and services.Horizontal control stations (those with precise Latitude, Longitude) were established in accordance with FGDC publications "Standards and Specifications for Geodetic Accuracy Standards" and "Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques" The final Latitude, Longitude of these stations were determined by a least squares adjustments of the horizontal observations. Horizontal control station have Latitude, Longitudes displayed to 5 places and are identified by attribute POS_SRCE = 'ADJUSTED'Lesser quality Latitude, Longitudes may also be preset in the dataset. These are identified by a POS_SRCE attributes HD_HELD1, HD_HELD2, or SCALED. These lesser quality positions are described at: https://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=SCALEDVertical control stations (those with precise Orthometric Heights) were established in accordance with FGDC publications "Standards and Specifications for Geodetic Accuracy Standards" The final Orthometric Height of these stations were in most cases determined by a least squares adjustments of the vertical observations but in some cases may have been keyed from old survey documents. Vertical control stations have Orthometric Heights displayed to 2 or 3 places and are identified by attribute ELEV_SRCE of ADJUSTED, ADJ UNCH, POSTED,READJUST,N HEIGHT,RESET,COMPUTEDLesser quality Orthometric Heights may also be preset in the dataset. These are identified by a ELEV_SRCE attributes GPS_OBS, VERT_ANG, H_LEVEL, VERTCON, SCALED. These lesser quality orthometric heights are described at: https://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=SCALEDIMPORTANT - Control stations do not always have both precise Latitude, Longitude AND precise Orthometric Height. A horizontal control station may have a orthometric height associated with it which is of non geodetic quality. These types of heights are displayed to 0, 1, or 2 decimal places. Worst case being off by +/- 1 meter. LIKEWISE - A Vertical control station may have a Latitude, Longitude associated with it which is of non geodetic quality. These types of Latitude, Longitudes are displayed to 0, 1 or 2 decimal places. Worst case being off by +/- 180 meter. Refer to https://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=SCALED for a description of the various type of methods used in determining the Latitude, Longitude, and Orthometric Height.Attribute POS_CHECK and ELEV_CHECK indicate whether or not an observational check was made to the position and/or orthometric height. Care should be taken when using "No Check" coordinates.If attribute ELEV_SRCE = 'VERTCON' then the Orthometric Height was determined by applying NGS program VERTCON to an Old NGVD 29 height. In most areas VERTCON gives results to +/- 2 cm. See https://www.ngs.noaa.gov/TOOLS/Vertcon/vertcon.html for a more detailed explanation of VERTCON accuracy.Ellipsoid Heights are also present in the dataset. The ellipsoid heights consist of those determined using a precise geoid model, which are displayed to 2 decimal places and are considered good to +/- .005 meters, and those displayed to 1 decimal place and are considered only good to +/- .5 metersQuantitative_Attribute_Accuracy_Assessment:Attribute_Accuracy_Value: 95 percent confidence level for geodetic quality data.Attribute_Accuracy_Explanation:Geodetic Data are continuously being processed; their standards and specifications are being reviewed for next publication release. "Standards and Specifications for Geodetic Control Networks", 1984 and "Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques," FGCS (formally FGCC) publication version 5.0 1989, are most current published documents.Logical_Consistency_Report:FGCS sponsored testing in cooperation with equipment manufacturers and National Institutes of Standards and Technology, Gaithersburg, MD 20850Completeness_Report:This dataset DOES NOT include destroyed marks. All other non-publishable marks are NOT included. Non-publishable criteria is available at https://www.ngs.noaa.gov/cgi-bin/craigs_lib.prl?HELP_NONPUB=1

  2. o

    Survey Markers

    • cityofsalinas.aws-ec2-us-east-1.opendatasoft.com
    • cityofsalinas.opendatasoft.com
    csv, excel, geojson +1
    Updated Nov 18, 2025
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    (2025). Survey Markers [Dataset]. https://cityofsalinas.aws-ec2-us-east-1.opendatasoft.com/explore/dataset/survey-markers/api/
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    geojson, json, excel, csvAvailable download formats
    Dataset updated
    Nov 18, 2025
    License

    https://wiki.creativecommons.org/wiki/public_domainhttps://wiki.creativecommons.org/wiki/public_domain

    Description

    This map depicts the locations of survey monuments within and surrounding the City of Salinas, Monterey County, California. Included are National Geodetic Survey (NGS) and city maintained monuments datasets. See NGS website for additional details on NGS monuments. This is not a comprehensive dataset for all survey monuments within the city, additional sources of monuments may be present within the city. City maintained monuments may not be included in the NGS dataset. This service was created by a member of the GIS team in 2017.

  3. a

    Elevation Benchmarks (Vertical Survey Control Points)

    • arc-gis-hub-home-arcgishub.hub.arcgis.com
    • opendata.cityofboise.org
    • +3more
    Updated Apr 20, 2018
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    City of Boise, Idaho (2018). Elevation Benchmarks (Vertical Survey Control Points) [Dataset]. https://arc-gis-hub-home-arcgishub.hub.arcgis.com/maps/boise::elevation-benchmarks-vertical-survey-control-points
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    Dataset updated
    Apr 20, 2018
    Dataset authored and provided by
    City of Boise, Idaho
    License

    MIT Licensehttps://opensource.org/licenses/MIT
    License information was derived automatically

    Area covered
    Description

    This is a point data set representing monumented vertical geodetic survey control points (a.k.a. elevation benchmarks) established by the City of Boise. A benchmark is a physical marker, monument, or demarcation established by a surveyor for horizontal and/or vertical measurement control. This data set only contains benchmarks established by the City of Boise that are based on the North American Vertical Datum of 1988 (NAVD 88); benchmarks established under other vertical datums are not included. The elevation values in this data set are based on the vertical control from the National Geodetic Survey (NGS), the U. S. Geological Survey (USGS), and some state owned vertical control. The horizontal location is obtained by Global Positioning System (GPS) data collection of the surveyed benchmark. Attribute data including elevation, is transcribed from surveying field books supplied by Boise City Public Works survey personnel. Data Attributes:MARK TYPE: ALCAP - Aluminum Cap, BRASSCAP - Brass Cap, CHISELSQ - physically carved square, PK - A steel masonry nail manufactured by Parker Kaelon (PK nail), OTHER - Any other survey marker type.LOCATION: Nearest street or cross streets to the benchmark.ELEVATION: The vertical elevation in feet above sea level as established from survey calculations based on the 1988 NAVD Datum.GPS DATE: Date the benchmark was captured by GPS.COMMENTS: Pertinent notes on general description and location of the benchmark.BOOK: The City of Boise Public Works surveying field book number the benchmark was established under.PAGE: The City of Boise Public Works surveying field book page the benchmark was established under.The data set is maintained by the Boise City Public Works GIS staff. The data is updated continuously. It is current to the date it was published.For more information, please visit Ada County Control Information or City of Boise Public Works.

  4. Digital Geologic-GIS Map of Devils Tower National Monument, Wyoming (NPS,...

    • catalog.data.gov
    • s.cnmilf.com
    Updated Nov 25, 2025
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    National Park Service (2025). Digital Geologic-GIS Map of Devils Tower National Monument, Wyoming (NPS, GRD, GRI, DETO, DETO digital map) adapted from a U.S. Geological Survey Bulletin map by Robinson (1956) [Dataset]. https://catalog.data.gov/dataset/digital-geologic-gis-map-of-devils-tower-national-monument-wyoming-nps-grd-gri-deto-deto-d
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    Dataset updated
    Nov 25, 2025
    Dataset provided by
    National Park Servicehttp://www.nps.gov/
    Area covered
    Wyoming
    Description

    The Digital Geologic-GIS Map of Devils Tower National Monument, Wyoming is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS data formats: 1.) a 10.1 file geodatabase (deto_geology.gdb), a 2.) Open Geospatial Consortium (OGC) geopackage, and 3.) 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. The file geodatabase format is supported with a 1.) ArcGIS Pro map file (.mapx) file (deto_geology.mapx) and individual Pro layer (.lyrx) files (for each GIS data layer), as well as with a 2.) 10.1 ArcMap (.mxd) map document (deto_geology.mxd) and individual 10.1 layer (.lyr) files (for each GIS data layer). The OGC geopackage is supported with a QGIS project (.qgz) file. Upon request, the GIS data is also available in ESRI 10.1 shapefile format. Contact Stephanie O'Meara (see contact information below) to acquire the GIS data in these GIS data formats. In addition to the GIS data and supporting GIS files, three additional files comprise a GRI digital geologic-GIS dataset or map: 1.) a readme file (deto_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (deto_geology.pdf) which contains geologic unit descriptions, as well as other ancillary map information and graphics from the source map(s) used by the GRI in the production of the GRI digital geologic-GIS data for the park, and 3.) a user-friendly FAQ PDF version of the metadata (deto_geology_metadata_faq.pdf). Please read the deto_geology_gis_readme.pdf for information pertaining to the proper extraction of the GIS data and other map files. Google Earth software is available for free at: https://www.google.com/earth/versions/. QGIS software is available for free at: https://www.qgis.org/en/site/. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). For a complete listing of GRI products visit the GRI publications webpage: https://www.nps.gov/subjects/geology/geologic-resources-inventory-products.htm. For more information about the Geologic Resources Inventory Program visit the GRI webpage: https://www.nps.gov/subjects/geology/gri.htm. At the bottom of that webpage is a "Contact Us" link if you need additional information. You may also directly contact the program coordinator, Jason Kenworthy (jason_kenworthy@nps.gov). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: U.S. Geological Survey. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (deto_geology_metadata.txt or deto_geology_metadata_faq.pdf). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:4,800 and United States National Map Accuracy Standards features are within (horizontally) 4.1 meters or 13.3 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS, QGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: https://www.nps.gov/articles/gri-geodatabase-model.htm).

  5. a

    USGS Legacy Benchmark Descriptions

    • hub.arcgis.com
    • hamhanding-dcdev.opendata.arcgis.com
    Updated Mar 19, 2012
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    KyGovMaps (2012). USGS Legacy Benchmark Descriptions [Dataset]. https://hub.arcgis.com/maps/kygeonet::usgs-legacy-benchmark-descriptions
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    Dataset updated
    Mar 19, 2012
    Dataset authored and provided by
    KyGovMaps
    License

    MIT Licensehttps://opensource.org/licenses/MIT
    License information was derived automatically

    Area covered
    Description

    The benchmark descriptions are grouped by United States Geological Survey (USGS) 15-minute quadrangles. Datums: North American Datum of 1927, National Geodetic Vertical Datum of 1929, Sea Level Datum of 1929. The documents were scanned to preserve the historic horizontal and vertical survey control data from USGS.Datasheets: https://kygeonet.ky.gov/ngs/usgs_datasheets/

  6. n

    Geodetic Control Points

    • nconemap.gov
    • data-nconemap.opendata.arcgis.com
    • +2more
    Updated Mar 24, 2017
    + more versions
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    NC OneMap / State of North Carolina (2017). Geodetic Control Points [Dataset]. https://www.nconemap.gov/datasets/geodetic-control-points
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    Dataset updated
    Mar 24, 2017
    Dataset authored and provided by
    NC OneMap / State of North Carolina
    License

    https://www.nconemap.gov/pages/termshttps://www.nconemap.gov/pages/terms

    Area covered
    Description

    This data contains a set of geodetic control stations maintained by the National Geodetic Survey. Each geodetic control station in this dataset has either a precise Latitude/Longitude used for horizontal control or a precise Orthometric Height used for vertical control, or both. The National Geodetic Survey (NGS) serves as the Nation's depository for geodetic data. The NGS distributes geodetic data worldwide to a variety of users. These geodetic data include the final results of geodetic surveys, software programs to format, compute, verify, and adjust original survey observations or to convert values from one geodetic datum to another, and publications that describe how to obtain and use Geodetic Data products and services.

  7. d

    ScienceBase Item Summary Page

    • datadiscoverystudio.org
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    U.S. Geological Survey, ScienceBase Item Summary Page [Dataset]. http://datadiscoverystudio.org/geoportal/rest/metadata/item/8ee1914edbf64100851977ef73523acb/html
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    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Area covered
    Description

    Link to the ScienceBase Item Summary page for the item described by this metadata record. Service Protocol: Link to the ScienceBase Item Summary page for the item described by this metadata record. Application Profile: Web Browser. Link Function: information

  8. U

    Data Release for Geologic Map of Petroglyph National Monument and Vicinity,...

    • data.usgs.gov
    • gimi9.com
    • +1more
    Updated Mar 11, 2020
    + more versions
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    Ren Thompson; Amy Gilmer; Ralph Shroba (2020). Data Release for Geologic Map of Petroglyph National Monument and Vicinity, Bernalillo County, New Mexico [Dataset]. http://doi.org/10.5066/P9LW817K
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    Dataset updated
    Mar 11, 2020
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Authors
    Ren Thompson; Amy Gilmer; Ralph Shroba
    License

    U.S. Government Workshttps://www.usa.gov/government-works
    License information was derived automatically

    Time period covered
    2020
    Area covered
    Bernalillo County, New Mexico
    Description

    This geologic map depicts and briefly describes geologic units underlying Petroglyph National Monument and immediately adjacent areas in Bernalillo County, New Mexico. The Monument is underlain dominantly by Quaternary basalts of the Albuquerque Volcanoes volcanic field, a series of basin-filling volcanic flows and associated vents from a monogenetic volcanic highland along the eastern margin of the Llano de Albuquerque. This compilation builds on data of previously published geologic maps and reports but includes new interpretive synthesis of volcanic stratigraphy and a unified representation of Quaternary surficial deposits overlying volcanic deposits within the Monument and areas immediately adjacent. This geologic map emphasizes the distribution of Quaternary volcanic vent areas and lava flow deposits which were incompletely mapped on previous publications. Surficial deposits are simplified, but uniformly mapped and described in contrast to varying map unit distributions, name ...

  9. Digital Geologic-GIS Map of Russell Cave National Monument and Vicinity,...

    • catalog.data.gov
    • s.cnmilf.com
    Updated Nov 25, 2025
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    National Park Service (2025). Digital Geologic-GIS Map of Russell Cave National Monument and Vicinity, Alabama (NPS, GRD, GRI, RUCA, RUCA digital map) adapted from a U.S. Geological Survey Professional Paper map by Hack (1966) [Dataset]. https://catalog.data.gov/dataset/digital-geologic-gis-map-of-russell-cave-national-monument-and-vicinity-alabama-nps-grd-gr
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    Dataset updated
    Nov 25, 2025
    Dataset provided by
    National Park Servicehttp://www.nps.gov/
    Description

    The Digital Geologic-GIS Map of Russell Cave National Monument and Vicinity, Alabama is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS data formats: 1.) a 10.1 file geodatabase (ruca_geology.gdb), a 2.) Open Geospatial Consortium (OGC) geopackage, and 3.) 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. The file geodatabase format is supported with a 1.) ArcGIS Pro map file (.mapx) file (ruca_geology.mapx) and individual Pro layer (.lyrx) files (for each GIS data layer), as well as with a 2.) 10.1 ArcMap (.mxd) map document (ruca_geology.mxd) and individual 10.1 layer (.lyr) files (for each GIS data layer). The OGC geopackage is supported with a QGIS project (.qgz) file. Upon request, the GIS data is also available in ESRI 10.1 shapefile format. Contact Stephanie O'Meara (see contact information below) to acquire the GIS data in these GIS data formats. In addition to the GIS data and supporting GIS files, three additional files comprise a GRI digital geologic-GIS dataset or map: 1.) a readme file (ruca_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (ruca_geology.pdf) which contains geologic unit descriptions, as well as other ancillary map information and graphics from the source map(s) used by the GRI in the production of the GRI digital geologic-GIS data for the park, and 3.) a user-friendly FAQ PDF version of the metadata (ruca_geology_metadata_faq.pdf). Please read the ruca_geology_gis_readme.pdf for information pertaining to the proper extraction of the GIS data and other map files. Google Earth software is available for free at: https://www.google.com/earth/versions/. QGIS software is available for free at: https://www.qgis.org/en/site/. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). For a complete listing of GRI products visit the GRI publications webpage: https://www.nps.gov/subjects/geology/geologic-resources-inventory-products.htm. For more information about the Geologic Resources Inventory Program visit the GRI webpage: https://www.nps.gov/subjects/geology/gri.htm. At the bottom of that webpage is a "Contact Us" link if you need additional information. You may also directly contact the program coordinator, Jason Kenworthy (jason_kenworthy@nps.gov). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: U.S. Geological Survey. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (ruca_geology_metadata.txt or ruca_geology_metadata_faq.pdf). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:24,000 and United States National Map Accuracy Standards features are within (horizontally) 12.2 meters or 40 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS, QGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: https://www.nps.gov/articles/gri-geodatabase-model.htm).

  10. U

    Katahdin Woods and Waters National Monument Seboeis Unit Vegetation Mapping...

    • data.usgs.gov
    • catalog.data.gov
    Updated Nov 10, 2022
    + more versions
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    Andrew Strassman; Stephanie Sattler; Kevin Hop; Janis Ruhser; Justin Schlawin; Don Cameron (2022). Katahdin Woods and Waters National Monument Seboeis Unit Vegetation Mapping Project: Vegetation Map Polygons [Dataset]. http://doi.org/10.5066/P93HGWGB
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    Dataset updated
    Nov 10, 2022
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Authors
    Andrew Strassman; Stephanie Sattler; Kevin Hop; Janis Ruhser; Justin Schlawin; Don Cameron
    License

    U.S. Government Workshttps://www.usa.gov/government-works
    License information was derived automatically

    Time period covered
    Oct 1, 2019 - Apr 1, 2020
    Area covered
    Seboeis
    Description

    The Katahdin Woods and Waters National Monument Seboeis Unit Vegetation Mapping Project was initiated in the fall of 2019 by a grant through the USGS Natural Resource Preservation Program to classify and map vegetation types of the Seboeis Unit thereby providing resource managers and biological researchers with useful baseline vegetation information. This layer provides the vegetation map for the Seboeis Unit. Information for this layer was collected in 2019 and 2020. After completion of the accuracy assessment process, 33 map classes represent the Seboeis Unit of the monument. Of the 33 map classes that represent the Seboeis Unit, 28 represent natural (including ruderal) vegetation types, consisting of 50 U.S. National Vegetation Classification (USNVC) association types. For the remaining 5 of the overall 33 map classes, 2 represent USNVC cultural types for barren areas and developed areas and 3 represent non-USNVC types for non-vegetated open water. Of the 28 map classes represe ...

  11. Digital Geologic-GIS Map of Devils Postpile National Monument and Vicinity,...

    • catalog.data.gov
    Updated Nov 11, 2025
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    National Park Service (2025). Digital Geologic-GIS Map of Devils Postpile National Monument and Vicinity, California (NPS, GRD, GRI, DEPO, DEPO digital map) adapted from a U.S. Geological Survey Professional Paper map by Hildreth and Fierstein (2016) [Dataset]. https://catalog.data.gov/dataset/digital-geologic-gis-map-of-devils-postpile-national-monument-and-vicinity-california-nps-
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    Dataset updated
    Nov 11, 2025
    Dataset provided by
    National Park Servicehttp://www.nps.gov/
    Area covered
    California
    Description

    The Digital Geologic-GIS Map of Devils Postpile National Monument and Vicinity, California is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS data formats: 1.) a 10.1 file geodatabase (depo_geology.gdb), a 2.) Open Geospatial Consortium (OGC) geopackage, and 3.) 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. The file geodatabase format is supported with a 1.) ArcGIS Pro map file (.mapx) file (depo_geology.mapx) and individual Pro layer (.lyrx) files (for each GIS data layer), as well as with a 2.) 10.1 ArcMap (.mxd) map document (depo_geology.mxd) and individual 10.1 layer (.lyr) files (for each GIS data layer). The OGC geopackage is supported with a QGIS project (.qgz) file. Upon request, the GIS data is also available in ESRI 10.1 shapefile format. Contact Stephanie O'Meara (see contact information below) to acquire the GIS data in these GIS data formats. In addition to the GIS data and supporting GIS files, three additional files comprise a GRI digital geologic-GIS dataset or map: 1.) a readme file (depo_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (depo_geology.pdf) which contains geologic unit descriptions, as well as other ancillary map information and graphics from the source map(s) used by the GRI in the production of the GRI digital geologic-GIS data for the park, and 3.) a user-friendly FAQ PDF version of the metadata (depo_geology_metadata_faq.pdf). Please read the depo_geology_gis_readme.pdf for information pertaining to the proper extraction of the GIS data and other map files. Google Earth software is available for free at: https://www.google.com/earth/versions/. QGIS software is available for free at: https://www.qgis.org/en/site/. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). For a complete listing of GRI products visit the GRI publications webpage: For a complete listing of GRI products visit the GRI publications webpage: https://www.nps.gov/subjects/geology/geologic-resources-inventory-products.htm. For more information about the Geologic Resources Inventory Program visit the GRI webpage: https://www.nps.gov/subjects/geology/gri,htm. At the bottom of that webpage is a "Contact Us" link if you need additional information. You may also directly contact the program coordinator, Jason Kenworthy (jason_kenworthy@nps.gov). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: U.S. Geological Survey. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (depo_geology_metadata.txt or depo_geology_metadata_faq.pdf). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:24,000 and United States National Map Accuracy Standards features are within (horizontally) 12.2 meters or 40 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS, QGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: https://www.nps.gov/articles/gri-geodatabase-model.htm).

  12. e

    GPS Monuments Geodatabase

    • maps.edmondok.gov
    Updated Feb 15, 2023
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    Ian.Peebles_EdmondOK (2023). GPS Monuments Geodatabase [Dataset]. https://maps.edmondok.gov/datasets/a7e60269f3534d559afe54538d0dbffe
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    Dataset updated
    Feb 15, 2023
    Dataset authored and provided by
    Ian.Peebles_EdmondOK
    Description

    GPS Monument Data features define survey information. These features are compiled from locations designated by the City of Edmond for accurate survey reference points. The monument data for the City of Edmond was originally produced by a highly accurate survey network of points throughout the City in 1995 and 1996. The goal of these GPS Monument Specifications is to maintain a high accuracy coordinate network for the City of Edmond. The monuments are used to maintain a high accuracy coordinate network in the City of Edmond. The GPS monument shall be constructed and set according to the City of Edmond GPS Monument Construction Standard. Every monument shall have a City of Edmond provided bronze marker stamped with a unique station number. Every effort should be made to place monuments in positions of extreme protection. Also locations that are accessible, safe and "GPSable" will be sought. Input from the City of Edmond is required before finalizing the position of GPS monuments. Following acceptance of monument construction, the center point of the monument shall be surveyed by a professional land surveyor registered with the State of Oklahoma for professional survey services to determine the actual positional coordinates of the monument. Coordinate data will be in NAD-83 format insuring compatibility with the new Oklahoma High Accuracy Reference Network. Elevation datum will be Mean Sea Level to insure accurate reference to local existent control, existing City of Edmond GPS monumentation and United States Geological Survey (USGS) benchmark data. Coordinates will be recorded in both Latitude and Longitude (degrees, minutes, seconds to the 4 significant digit) and State Plane US. Survey Feet. The minimum positional accuracy of GPS Monuments will be within 2cm. The accuracy of the GPS monument will be checked by the City of Edmond within one month of the monument being placed and surveyed.The City of Edmond makes every effort to produce and publish the most accurate information possible. While we are constantly updating our database and services, we cannot guarantee 100 percent accuracy and disclaim any responsibility for the accuracy of this data.

  13. U

    Katahdin Woods and Waters National Monument Seboeis Unit Vegetation Mapping...

    • data.usgs.gov
    • datasets.ai
    • +1more
    Updated Nov 10, 2022
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    Andrew Strassman; Stephanie Sattler; Kevin Hop; Janis Ruhser; Justin Schlawin; Don Cameron (2022). Katahdin Woods and Waters National Monument Seboeis Unit Vegetation Mapping Project: Aerial Imagery Point Locations [Dataset]. http://doi.org/10.5066/P93HGWGB
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    Dataset updated
    Nov 10, 2022
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Authors
    Andrew Strassman; Stephanie Sattler; Kevin Hop; Janis Ruhser; Justin Schlawin; Don Cameron
    License

    U.S. Government Workshttps://www.usa.gov/government-works
    License information was derived automatically

    Time period covered
    Oct 5, 2019
    Area covered
    Seboeis
    Description

    The Katahdin Woods and Waters National Monument Seboeis Unit Vegetation Mapping Project was initiated in the fall of 2019 by a grant through the USGS Natural Resource Preservation Program to classify and map vegetation types of the Seboeis Unit thereby providing resource managers and biological researchers with useful baseline vegetation information. High-resolution aerial imagery was collected on October 5, 2019 with a Phase One iXU-R 180 RGB camera co-mounted with a Phase One iXU-RS 160 Achromatic camera. Images from the two cameras are merged to create 4-band imagery that can be displayed as either true-color (RGB) or color-infrared (CIR). The imagery has a resolution of approximately 0.15 meter/pixel (6 inches). A total of 1,354 tiles were collected. Brian Lubinski of USFWS collected project imagery with assistance from Benjamin Finley at USGS.

  14. A

    Unpublished Digital Bedrock Geologic Map of Aniakchak National Monument and...

    • data.amerigeoss.org
    • s.cnmilf.com
    • +1more
    api, xml, zip
    Updated May 26, 2015
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    United States (2015). Unpublished Digital Bedrock Geologic Map of Aniakchak National Monument and Preserve and Vicinity, Alaska (NPS, GRD, GRI, ANIA, ANIA digital map) adapted from USGS unpublished digital data by Wilson, F.H. (2008) and USGS maps by Pilcher (2000), Wilson (1999) and Detterman (1985) [Dataset]. https://data.amerigeoss.org/pt_BR/dataset/unpublished-digital-bedrock-geologic-map-of-aniakchak-national-monument-and-preserve-and-v-1985
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    xml, api, zipAvailable download formats
    Dataset updated
    May 26, 2015
    Dataset provided by
    United States
    Area covered
    Alaska
    Description

    The Unpublished Digital Bedrock Geologic Map of Aniakchak National Monument and Preserve and Vicinity, Alaska is composed of GIS data layers and GIS tables in a 10.1 file geodatabase (ania_geology.gdb), a 10.1 ArcMap (.MXD) map document (ania_geology.mxd), individual 10.1 layer (.LYR) files for each GIS data layer, an ancillary map information (.PDF) document (ania_geology.pdf) which contains source map unit descriptions, as well as other source map text, figures and tables, metadata in FGDC text (.TXT) and FAQ (.HTML) formats, and a GIS readme file (ania_gis_readme.pdf). Please read the ania_gis_readme.pdf for information pertaining to the proper extraction of the file geodatabase and other map files. To request GIS data in ESRI 10.1 shapefile format contact Stephanie O Meara (stephanie.o meara@colostate.edu; see contact information below). The data is also available as a 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. Google Earth software is available for free at: http://www.google.com/earth/index.html. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: U.S. Geological Survey. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (ania_metadata_faq.html; available at http://nrdata.nps.gov/geology/gri_data/gis/ania/ania_metadata_faq.html). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:250,000 and United States National Map Accuracy Standards features are within (horizontally) 254 meters or 833.3 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.2. (available at: http://science.nature.nps.gov/im/inventory/geology/GeologyGISDataModel.cfm). The GIS data projection is NAD83, UTM Zone AD_1983_Alaska_AlbersN, however, for the KML/KMZ format the data is projected upon export to WGS84 Geographic, the native coordinate system used by Google Earth. The data is within the area of interest of Aniakchak National Monument and Preserve.

  15. Digital Geologic-GIS Map of the Golden Spike Monument Quadrangle, Utah (NPS,...

    • s.cnmilf.com
    • catalog.data.gov
    Updated Oct 5, 2025
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    National Park Service (2025). Digital Geologic-GIS Map of the Golden Spike Monument Quadrangle, Utah (NPS, GRD, GRI, GOSP, GSPM digital map) adapted from a U.S. Geological Survey unpublished digital map by Miller and Crittenden (2004) [Dataset]. https://s.cnmilf.com/user74170196/https/catalog.data.gov/dataset/digital-geologic-gis-map-of-the-golden-spike-monument-quadrangle-utah-nps-grd-gri-gosp-gsp
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    Dataset updated
    Oct 5, 2025
    Dataset provided by
    National Park Servicehttp://www.nps.gov/
    Area covered
    Utah
    Description

    The Digital Geologic-GIS Map of the Golden Spike Monument Quadrangle, Utah is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS data formats: 1.) an ESRI file geodatabase (gspm_geology.gdb), and a 2.) Open Geospatial Consortium (OGC) geopackage. The file geodatabase format is supported with a 1.) ArcGIS Pro 3.X map file (.mapx) file (gspm_geology.mapx) and individual Pro 3.X layer (.lyrx) files (for each GIS data layer). Upon request, the GIS data is also available in ESRI shapefile format. Contact Stephanie O'Meara (see contact information below) to acquire the GIS data in these GIS data formats. In addition to the GIS data and supporting GIS files, three additional files comprise a GRI digital geologic-GIS dataset or map: 1.) a readme file (gosp_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (gosp_geology.pdf) which contains geologic unit descriptions, as well as other ancillary map information and graphics from the source map(s) used by the GRI in the production of the GRI digital geologic-GIS data for the park, and 3.) a user-friendly FAQ PDF version of the metadata (gspm_geology_metadata_faq.pdf). Please read the gosp_geology_gis_readme.pdf for information pertaining to the proper extraction of the GIS data and other map files. QGIS software is available for free at: https://www.qgis.org/en/site/. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). For a complete listing of GRI products visit the GRI publications webpage: https://www.nps.gov/subjects/geology/geologic-resources-inventory-products.htm. For more information about the Geologic Resources Inventory Program visit the GRI webpage: https://www.nps.gov/subjects/geology/gri.htm. At the bottom of that webpage is a "Contact Us" link if you need additional information. You may also directly contact the program coordinator, Jason Kenworthy (jason_kenworthy@nps.gov). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: U.S. Geological Survey. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (gspm_geology_metadata.txt or gspm_geology_metadata_faq.pdf). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:24,000 and United States National Map Accuracy Standards features are within (horizontally) 12.2 meters or 40 feet of their actual _location as presented by this dataset. Users of this data should thus not assume the _location of features is exactly where they are portrayed in ArcGIS Pro, QGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: https://www.nps.gov/articles/gri-geodatabase-model.htm).

  16. d

    Digital Geologic-GIS Map of Navajo National Monument and Vicinity, Arizona...

    • datasets.ai
    33, 57
    Updated May 31, 2023
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    Department of the Interior (2023). Digital Geologic-GIS Map of Navajo National Monument and Vicinity, Arizona (NPS, GRD, GRI, NAVA, NAVA digital map) adapted from a U.S. Geological Survey Professional Paper map by Cooley, Harshbarger, Akers, Hardt and Hicks (1969) [Dataset]. https://datasets.ai/datasets/digital-geologic-gis-map-of-navajo-national-monument-and-vicinity-arizona-nps-grd-gri-nava
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    33, 57Available download formats
    Dataset updated
    May 31, 2023
    Dataset authored and provided by
    Department of the Interior
    Area covered
    Arizona
    Description

    The Unpublished Digital Geologic-GIS Map of Navajo National Monument and Vicinity, Arizona is composed of GIS data layers and GIS tables in a 10.1 file geodatabase (nava_geology.gdb), a 10.1 ArcMap (.mxd) map document (nava_geology.mxd), individual 10.1 layer (.lyr) files for each GIS data layer, an ancillary map information document (nava_geology.pdf) which contains source map unit descriptions, as well as other source map text, figures and tables, metadata in FGDC text (.txt) and FAQ (.pdf) formats, and a GIS readme file (nava_geology_gis_readme.pdf). Please read the nava_geology_gis_readme.pdf for information pertaining to the proper extraction of the file geodatabase and other map files. To request GIS data in ESRI 10.1 shapefile format contact Stephanie O'Meara (stephanie.omeara@colostate.edu; see contact information below). The data is also available as a 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. Google Earth software is available for free at: http://www.google.com/earth/index.html. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: U.S. Geological Survey. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (nava_geology_metadata.txt or nava_geology_metadata_faq.pdf). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:125,000 and United States National Map Accuracy Standards features are within (horizontally) 63.5 meters or 208.3 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: https://www.nps.gov/articles/gri-geodatabase-model.htm). The GIS data projection is NAD83, UTM Zone 12N, however, for the KML/KMZ format the data is projected upon export to WGS84 Geographic, the native coordinate system used by Google Earth. The data is within the area of interest of Navajo National Monument.

  17. Digital Geologic-GIS Map of Dinosaur National Monument and Vicinity,...

    • catalog.data.gov
    • s.cnmilf.com
    Updated Nov 25, 2025
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    National Park Service (2025). Digital Geologic-GIS Map of Dinosaur National Monument and Vicinity, Colorado and Utah (NPS, GRD, GRI, DINO, DINO digital map) adapted from U.S. Geological Survey Geologic Quadrangle Maps by Hansen, Rowley, Dyni, Cullins, Carrara, Kinney and Pipiringos (1968 to 1991) [Dataset]. https://catalog.data.gov/dataset/digital-geologic-gis-map-of-dinosaur-national-monument-and-vicinity-colorado-and-utah-nps-
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    Dataset updated
    Nov 25, 2025
    Dataset provided by
    National Park Servicehttp://www.nps.gov/
    Area covered
    Colorado, Utah
    Description

    The Digital Geologic-GIS Map of Dinosaur National Monument and Vicinity, Colorado and Utah is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS data formats: 1.) an ESRI file geodatabase (dino_geology.gdb), a 2.) Open Geospatial Consortium (OGC) geopackage, and 3.) 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. The file geodatabase format is supported with a 1.) ArcGIS Pro 3.X map file (.mapx) file (dino_geology.mapx) and individual Pro 3.X layer (.lyrx) files (for each GIS data layer). The OGC geopackage is supported with a QGIS project (.qgz) file. Upon request, the GIS data is also available in ESRI shapefile format. Contact Stephanie O'Meara (see contact information below) to acquire the GIS data in these GIS data formats. In addition to the GIS data and supporting GIS files, three additional files comprise a GRI digital geologic-GIS dataset or map: 1.) a readme file (dino_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (dino_geology.pdf) which contains geologic unit descriptions, as well as other ancillary map information and graphics from the source map(s) used by the GRI in the production of the GRI digital geologic-GIS data for the park, and 3.) a user-friendly FAQ PDF version of the metadata (dino_geology_metadata_faq.pdf). Please read the dino_geology_gis_readme.pdf for information pertaining to the proper extraction of the GIS data and other map files. Google Earth software is available for free at: https://www.google.com/earth/versions/. QGIS software is available for free at: https://www.qgis.org/en/site/. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). For a complete listing of GRI products visit the GRI publications webpage: https://www.nps.gov/subjects/geology/geologic-resources-inventory-products.htm. For more information about the Geologic Resources Inventory Program visit the GRI webpage: https://www.nps.gov/subjects/geology/gri.htm. At the bottom of that webpage is a "Contact Us" link if you need additional information. You may also directly contact the program coordinator, Jason Kenworthy (jason_kenworthy@nps.gov). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: U.S. Geological Survey. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (dino_geology_metadata.txt or dino_geology_metadata_faq.pdf). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:62,500 and United States National Map Accuracy Standards features are within (horizontally) 31.8 meters or 104.2 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS Pro, QGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: https://www.nps.gov/articles/gri-geodatabase-model.htm).

  18. c

    Katahdin Woods and Waters National Monument Seboeis Unit Vegetation Mapping...

    • s.cnmilf.com
    • data.usgs.gov
    • +1more
    Updated Oct 1, 2025
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    U.S. Geological Survey (2025). Katahdin Woods and Waters National Monument Seboeis Unit Vegetation Mapping Project: Vegetation Points (Accuracy Assessment Sites and Vegetation Plots) [Dataset]. https://s.cnmilf.com/user74170196/https/catalog.data.gov/dataset/katahdin-woods-and-waters-national-monument-seboeis-unit-vegetation-mapping-project-vegeta
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    Dataset updated
    Oct 1, 2025
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Area covered
    Seboeis
    Description

    During summer 2019, botanists with the Maine Natural Areas Program collected data from 94 vegetation plots for plant community characterization. The sampling data were entered into the National Park Service PLOTS version 4.0 (National Park Service 2018) for analyses to characterize vegetation associations in the U.S. National Vegetation Classification. An accuracy assessment was performed on the draft version of the vegetation map layer. During the summer of 2020, field crews collected data from 107 stratified and randomly selected sites for evaluating the accuracy of the vegetation map layer for those map classes representing U.S. National Vegetation Classification associations. The accuracy assessment field data were then compared to the vegetation map data. Results from the accuracy assessment study show an overall accuracy of 87.6% (kappa index of 87.0%) based on an analysis of data from 105 of the 107 accuracy assessment sites.

  19. A

    Digital Geologic-GIS Map of Tuzigoot National Monument, Arizona (NPS, GRD,...

    • data.amerigeoss.org
    • catalog.data.gov
    api, zip
    Updated Feb 13, 2018
    + more versions
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    United States (2018). Digital Geologic-GIS Map of Tuzigoot National Monument, Arizona (NPS, GRD, GRI, TUZI, TUZI digital map) adapted from a U.S. Geological Survey Bulletin map by Lehner (1958) [Dataset]. https://data.amerigeoss.org/dataset/digital-geologic-gis-map-of-tuzigoot-national-monument-arizona-nps-grd-gri-tuzi-tuzi-digit-1958
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    zip, apiAvailable download formats
    Dataset updated
    Feb 13, 2018
    Dataset provided by
    United States
    Area covered
    Arizona
    Description

    The Unpublished Digital Geologic-GIS Map of Tuzigoot National Monument, Arizona is composed of GIS data layers and GIS tables in a 10.1 file geodatabase (tuzi_geology.gdb), a 10.1 ArcMap (.MXD) map document (tuzi_geology.mxd), individual 10.1 layer (.LYR) files for each GIS data layer, an ancillary map information (.PDF) document (moca_tuzi_geology.pdf) which contains source map unit descriptions, as well as other source map text, figures and tables, metadata in FGDC text (.TXT) and FAQ (.HTML) formats, and a GIS readme file (moca_tuzi_geology_gis_readme.pdf). Please read the moca_tuzi_geology_gis_readme.pdf for information pertaining to the proper extraction of the file geodatabase and other map files. To request GIS data in ESRI 10.1 shapefile format contact Stephanie O'Meara (stephanie.omeara@colostate.edu; see contact information below). The data is also available as a 2.2 KMZ/KML file for use in Google Earth, however, this format version of the map is limited in data layers presented and in access to GRI ancillary table information. Google Earth software is available for free at: http://www.google.com/earth/index.html. Users are encouraged to only use the Google Earth data for basic visualization, and to use the GIS data for any type of data analysis or investigation. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) Division funded program that is administered by the NPS Geologic Resources Division (GRD). Source geologic maps and data used to complete this GRI digital dataset were provided by the following: U.S. Geological Survey. Detailed information concerning the sources used and their contribution the GRI product are listed in the Source Citation section(s) of this metadata record (tuzi_geology_metadata_faq.html; available at http://nrdata.nps.gov/geology/gri_data/gis/tuzi/tuzi_geology_metadata_faq.html). Users of this data are cautioned about the locational accuracy of features within this dataset. Based on the source map scale of 1:48,000 and United States National Map Accuracy Standards features are within (horizontally) 24.4 meters or 80 feet of their actual location as presented by this dataset. Users of this data should thus not assume the location of features is exactly where they are portrayed in Google Earth, ArcGIS or other software used to display this dataset. All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.3. (available at: http://science.nature.nps.gov/im/inventory/geology/GeologyGISDataModel.cfm). The GIS data projection is NAD83, UTM Zone 12N, however, for the KML/KMZ format the data is projected upon export to WGS84 Geographic, the native coordinate system used by Google Earth. The data is within the area of interest of Tuzigoot National Monument.

  20. NGS MONUMENTS

    • public-nps.opendata.arcgis.com
    Updated Mar 13, 2025
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    National Park Service (2025). NGS MONUMENTS [Dataset]. https://public-nps.opendata.arcgis.com/maps/nps::ngs-monuments
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    Dataset updated
    Mar 13, 2025
    Dataset authored and provided by
    National Park Servicehttp://www.nps.gov/
    Area covered
    Description

    This is a vector point dataset that represents survey monument features within Great Smoky Mountains National Park. It provides useful information for park staff and who are working on construction projects or boundary management activities. It also provides useful information for the public, such as boundary monument location information for state-licensed surveyors working on property surveys adjoining NPS lands. The NPS Monuments layer was initially created on 08/06/2010 using ArcMap 9.3 by generating point features from coordinate pairs provided by Denver Service Center (DSC) survey project deliverable files. Scanned monument record sheets or survey plats are hyperlinked to each point feature. Detailed attributes include point source, coordinate values, expected accuracies and date/time information. The NGS Monuments layer is a subset of the National Geodetic Survey monuments layer. The Boundary Markers layer is managed and maintained by the Great Smoky Mountains National Park Land Surveyor. The goal of this dataset is to provide survey information to help reduce redundancies and costs for construction projects, boundary surveys and boundary management.The corresponding Integration of Resource Management Applications (IRMA) NPS Data Store reference is Great Smoky Mountains National Park Monuments.

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County of Volusia (2024). NGS Benchmarks [Dataset]. https://hub.arcgis.com/maps/VolusiaCountyFL::ngs-benchmarks

NGS Benchmarks

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Dataset updated
Aug 5, 2024
Dataset authored and provided by
County of Volusia
Area covered
Description

This data is a subset of the original National Geodetic Survey (NGS) data that includes only locations within Volusia County, FL.This data contains a set of geodetic control stations maintained by the National Geodetic Survey. Each geodetic control station in this dataset has either a precise Latitude/Longitude used for horizontal control or a precise Orthometric Height used for vertical control, or both.The National Geodetic Survey (NGS) serves as the Nation's depository for geodetic data. The NGS distributes geodetic data worldwide to a variety of users. These geodetic data include the final results of geodetic surveys, software programs to format, compute, verify, and adjust original survey observations or to convert values from one geodetic datum to another, and publications that describe how to obtain and use Geodetic Data products and services.Horizontal control stations (those with precise Latitude, Longitude) were established in accordance with FGDC publications "Standards and Specifications for Geodetic Accuracy Standards" and "Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques" The final Latitude, Longitude of these stations were determined by a least squares adjustments of the horizontal observations. Horizontal control station have Latitude, Longitudes displayed to 5 places and are identified by attribute POS_SRCE = 'ADJUSTED'Lesser quality Latitude, Longitudes may also be preset in the dataset. These are identified by a POS_SRCE attributes HD_HELD1, HD_HELD2, or SCALED. These lesser quality positions are described at: https://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=SCALEDVertical control stations (those with precise Orthometric Heights) were established in accordance with FGDC publications "Standards and Specifications for Geodetic Accuracy Standards" The final Orthometric Height of these stations were in most cases determined by a least squares adjustments of the vertical observations but in some cases may have been keyed from old survey documents. Vertical control stations have Orthometric Heights displayed to 2 or 3 places and are identified by attribute ELEV_SRCE of ADJUSTED, ADJ UNCH, POSTED,READJUST,N HEIGHT,RESET,COMPUTEDLesser quality Orthometric Heights may also be preset in the dataset. These are identified by a ELEV_SRCE attributes GPS_OBS, VERT_ANG, H_LEVEL, VERTCON, SCALED. These lesser quality orthometric heights are described at: https://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=SCALEDIMPORTANT - Control stations do not always have both precise Latitude, Longitude AND precise Orthometric Height. A horizontal control station may have a orthometric height associated with it which is of non geodetic quality. These types of heights are displayed to 0, 1, or 2 decimal places. Worst case being off by +/- 1 meter. LIKEWISE - A Vertical control station may have a Latitude, Longitude associated with it which is of non geodetic quality. These types of Latitude, Longitudes are displayed to 0, 1 or 2 decimal places. Worst case being off by +/- 180 meter. Refer to https://www.ngs.noaa.gov/cgi-bin/ds_lookup.prl?Item=SCALED for a description of the various type of methods used in determining the Latitude, Longitude, and Orthometric Height.Attribute POS_CHECK and ELEV_CHECK indicate whether or not an observational check was made to the position and/or orthometric height. Care should be taken when using "No Check" coordinates.If attribute ELEV_SRCE = 'VERTCON' then the Orthometric Height was determined by applying NGS program VERTCON to an Old NGVD 29 height. In most areas VERTCON gives results to +/- 2 cm. See https://www.ngs.noaa.gov/TOOLS/Vertcon/vertcon.html for a more detailed explanation of VERTCON accuracy.Ellipsoid Heights are also present in the dataset. The ellipsoid heights consist of those determined using a precise geoid model, which are displayed to 2 decimal places and are considered good to +/- .005 meters, and those displayed to 1 decimal place and are considered only good to +/- .5 metersQuantitative_Attribute_Accuracy_Assessment:Attribute_Accuracy_Value: 95 percent confidence level for geodetic quality data.Attribute_Accuracy_Explanation:Geodetic Data are continuously being processed; their standards and specifications are being reviewed for next publication release. "Standards and Specifications for Geodetic Control Networks", 1984 and "Geometric Geodetic Accuracy Standards and Specifications for Using GPS Relative Positioning Techniques," FGCS (formally FGCC) publication version 5.0 1989, are most current published documents.Logical_Consistency_Report:FGCS sponsored testing in cooperation with equipment manufacturers and National Institutes of Standards and Technology, Gaithersburg, MD 20850Completeness_Report:This dataset DOES NOT include destroyed marks. All other non-publishable marks are NOT included. Non-publishable criteria is available at https://www.ngs.noaa.gov/cgi-bin/craigs_lib.prl?HELP_NONPUB=1

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