60 datasets found
  1. a

    NGS Benchmarks

    • opendata-volusiacountyfl.hub.arcgis.com
    • hub.arcgis.com
    Updated Aug 5, 2024
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    County of Volusia (2024). NGS Benchmarks [Dataset]. https://opendata-volusiacountyfl.hub.arcgis.com/datasets/ngs-benchmarks
    Explore at:
    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. a

    Geodetic Control Benchmarks

    • hub.arcgis.com
    • arc-gis-hub-home-arcgishub.hub.arcgis.com
    Updated Nov 18, 2013
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Environmental Data Center (2013). Geodetic Control Benchmarks [Dataset]. https://hub.arcgis.com/maps/edc::geodetic-control-benchmarks
    Explore at:
    Dataset updated
    Nov 18, 2013
    Dataset authored and provided by
    Environmental Data Center
    Area covered
    Description

    This data contains a set of geodetic control stations maintained by the National Geodetic Survey in the state of Rhode Island. 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.

    This dataset represents all geodetic control stations throughout the state of Rhode Island. 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.

  3. Geodetic Control Points - National Geodetic Survey Benchmarks

    • data.wu.ac.at
    xml
    Updated Aug 19, 2017
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    NSGIC Local Govt | GIS Inventory (2017). Geodetic Control Points - National Geodetic Survey Benchmarks [Dataset]. https://data.wu.ac.at/schema/data_gov/MmNiY2I1OTAtMzliNS00ODZmLThlMDgtZDYyMjMxYWJmMDJm
    Explore at:
    xmlAvailable download formats
    Dataset updated
    Aug 19, 2017
    Dataset provided by
    National States Geographic Information Council
    Area covered
    acf20e9c77f2da2f2c7b8ff1b5f94df474c0e9c4
    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 data is extracted and selection done for Volusia County, Fl. 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.

  4. a

    NGS Survey Points

    • data-tiptoncountygis.hub.arcgis.com
    Updated Jan 10, 2020
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Tipton County GIS (2020). NGS Survey Points [Dataset]. https://data-tiptoncountygis.hub.arcgis.com/datasets/ngs-survey-points
    Explore at:
    Dataset updated
    Jan 10, 2020
    Dataset authored and provided by
    Tipton County GIS
    Area covered
    Description

    Data created by the National Geodetic Survey are survey markers, also called survey marks, survey monuments, survey benchmarks or geodetic marks, placed to mark key survey points on the Earth's surface.

  5. a

    app Pennsylvania Area NGS Geodetic Control Stations

    • pa-geo-data-pennmap.hub.arcgis.com
    Updated Apr 8, 2014
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Cambria County GIS Center (2014). app Pennsylvania Area NGS Geodetic Control Stations [Dataset]. https://pa-geo-data-pennmap.hub.arcgis.com/datasets/CambriaPA::app-pennsylvania-area-ngs-geodetic-control-stations
    Explore at:
    Dataset updated
    Apr 8, 2014
    Dataset authored and provided by
    Cambria County GIS Center
    Area covered
    Pennsylvania
    Description

    This map displays National Geodetic Survey (NGS) classifications of geodetic control stations for the Pennsylvania area with PennDOT county and municipal boundaries.NOAA Charting and Geodesy: https://www.noaa.gov/chartingNOAA Survey Map: https://noaa.maps.arcgis.com/apps/webappviewer/index.html?id=190385f9aadb4cf1b0dd8759893032dbPennDOT GIS Hub: GIS Hub (arcgis.com)

  6. K

    Denver, Colorado Benchmarks

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated May 15, 2019
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    City and County of Denver, Colorado (2019). Denver, Colorado Benchmarks [Dataset]. https://koordinates.com/layer/101875-denver-colorado-benchmarks/
    Explore at:
    dwg, geodatabase, kml, csv, pdf, geopackage / sqlite, shapefile, mapinfo tab, mapinfo mifAvailable download formats
    Dataset updated
    May 15, 2019
    Dataset authored and provided by
    City and County of Denver, Colorado
    Area covered
    Description

    This dataset contains vertical benchmark data for the City and County of Denver. Monumentation for this dataset includes U.S. Coast and Geodetic Survey (USCGS), National Geodetic Survey (NGS), and City and County of Denver (CCD) benchmarks. Elevations for bench marks are typically determined by standard differential leveling activity. NGS High-Accuracy Reference Network (HARN) points are portrayed in the ENG_SRVNGSHARN_P dataset.

  7. k

    USGS Legacy Benchmark Descriptions

    • opengisdata.ky.gov
    • data.lojic.org
    • +2more
    Updated Mar 19, 2012
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    KyGovMaps (2012). USGS Legacy Benchmark Descriptions [Dataset]. https://opengisdata.ky.gov/datasets/usgs-legacy-benchmark-descriptions
    Explore at:
    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/

  8. d

    Geodetic Control Points, Effingham Geodetic NGS Monuments - benchmarks...

    • datadiscoverystudio.org
    Updated Jan 1, 2007
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Effingham County Government (2007). Geodetic Control Points, Effingham Geodetic NGS Monuments - benchmarks downloaded from http://www.ngs.noaa.gov/cgi-bin/datasheet.prl, Published in 2007, 1:2400 (1in=200ft) scale, Effingham County Government. [Dataset]. http://datadiscoverystudio.org/geoportal/rest/metadata/item/dad6b9d9080a4dc595f021a417108b37/html
    Explore at:
    Dataset updated
    Jan 1, 2007
    Dataset authored and provided by
    Effingham County Government
    Area covered
    Description

    Geodetic Control Points dataset current as of 2007. Effingham Geodetic NGS Monuments - benchmarks downloaded from http://www.ngs.noaa.gov/cgi-bin/datasheet.prl.

  9. C

    Water Level Superseded Benchmark Sheets

    • data.cnra.ca.gov
    Updated May 9, 2019
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Ocean Data Partners (2019). Water Level Superseded Benchmark Sheets [Dataset]. https://data.cnra.ca.gov/dataset/water-level-superseded-benchmark-sheets
    Explore at:
    Dataset updated
    May 9, 2019
    Dataset authored and provided by
    Ocean Data Partners
    Description

    Images of National Coast & Geodetic Survey (now NOAA's National Geodetic Survey/NGS) tidal benchmarks which have been superseded by new markers or locations. Period of record is 1830-1984. Scanned under the Climate Database Modernization Program.

  10. d

    Data from: USGS Benchmark Glacier Mass Balance and Project Data

    • catalog.data.gov
    • data.usgs.gov
    Updated Jul 6, 2024
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    U.S. Geological Survey (2024). USGS Benchmark Glacier Mass Balance and Project Data [Dataset]. https://catalog.data.gov/dataset/usgs-benchmark-glacier-mass-balance-and-project-data
    Explore at:
    Dataset updated
    Jul 6, 2024
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Description

    Since the late 1950s, the USGS has maintained a long-term glacier mass-balance program at three North American glaciers. Measurements began on South Cascade Glacier, WA in 1958, expanding to Gulkana and Wolverine glaciers, AK in 1966, and later Sperry Glacier, MT in 2005. Additional measurements have been made on Lemon Creek Glacier, AK to compliment data collected by the Juneau Icefield Research Program (JIRP; Pelto and others, 2013). Direct field measurements of point glaciological data are combined with weather and geodetic data to estimate the seasonal and annual mass balance at each glacier in both a conventional and reference surface format (Cogley and others, 2011). The analysis framework (O'Neel, 2019; prior to v 3.0 van Beusekom and others, 2010) is identical at each glacier to enable cross-comparison between output time series. Vocabulary used follows Cogley and others (2011) Glossary of Glacier Mass Balance.

  11. O

    Benchmark

    • data.brla.gov
    • catalog.data.gov
    Updated Sep 16, 2022
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    National Geodetic Survey (NGS) (2022). Benchmark [Dataset]. https://data.brla.gov/w/4upw-qimu/_variation_?cur=H17k_ZoNEvP&from=root
    Explore at:
    tsv, csv, kmz, xml, application/rssxml, application/geo+json, application/rdfxml, kmlAvailable download formats
    Dataset updated
    Sep 16, 2022
    Dataset authored and provided by
    National Geodetic Survey (NGS)
    License

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

    Description

    Point geometry with attributes displaying geodetic control stations (benchmarks) in East Baton Rouge Parish, Louisiana.

  12. d

    USGS Benchmark Glacier Project Comprehensive Data Collection

    • catalog.data.gov
    • data.usgs.gov
    Updated Feb 22, 2025
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    U.S. Geological Survey (2025). USGS Benchmark Glacier Project Comprehensive Data Collection [Dataset]. https://catalog.data.gov/dataset/usgs-benchmark-glacier-project-comprehensive-data-collection
    Explore at:
    Dataset updated
    Feb 22, 2025
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Description

    Mountain glaciers are closely coupled to climate processes, ecosystems, and regional water resources. To enhance physical understanding of these connections, the USGS maintains a collection of glacier mass balance and climate data across the western United States and Alaska. In some cases, records of glacier mass balance extend back to the mid-1940s. These data have been incorporated from various sources, primarily original USGS studies, but also including work from the University of Alaska, and the Juneau Icefield Research Program (JIRP). The core of this collection is composed of mass balance data from the USGS Benchmark Glaciers. These five glaciers are Lemon Creek Glacier, AK (1953 -Present), South Cascade Glacier, WA (1958 - Present), Gulkana and Wolverine glaciers, AK (1966 - Present), and Sperry Glacier, MT (2005 - Present). Datasets from each benchmark glacier are composed of, at a minimum, point mass balances, glacier hypsometry, daily temperature and precipitation, geodetic mass balances, and glacier-wide mass balances. Data from other glaciers within this collection may be less complete, continuous, or representative as data from the benchmark glaciers. In these cases, we urge users to carefully inspect the associated metadata of each specific data release for further details.

  13. d

    Elevation Benchmarks (Vertical Survey Control Points)

    • catalog.data.gov
    • opendata.cityofboise.org
    • +2more
    Updated Apr 20, 2018
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    City of Boise, Idaho (2018). Elevation Benchmarks (Vertical Survey Control Points) [Dataset]. https://catalog.data.gov/ro/dataset/elevation-benchmarks-vertical-survey-control-points
    Explore at:
    Dataset updated
    Apr 20, 2018
    Dataset provided by
    City of Boise, Idaho
    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.

  14. o

    Benchmarking variant calling tools for NGS data

    • explore.openaire.eu
    Updated Jan 1, 2017
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Sarah Sandmann; Aniek Graaf; Mohsen Karimi; Bert Reijden; Eva Hellström-Lindberg; Joop Jansen; Martin Dugas (2017). Benchmarking variant calling tools for NGS data [Dataset]. http://doi.org/10.7490/f1000research.1114602.1
    Explore at:
    Dataset updated
    Jan 1, 2017
    Authors
    Sarah Sandmann; Aniek Graaf; Mohsen Karimi; Bert Reijden; Eva Hellström-Lindberg; Joop Jansen; Martin Dugas
    Description

    Next-generation sequencing (NGS) has revolutionized the application of personalized medicine. Already, sequencing results influence diagnosis, prognosis and even therapy. However, for the application of NGS in clinical routine, it is most essential to deal with valid results. To perform variant calling, there are numerous tools that usually feature different algorithms, filtering strategies, recommendations and thus, also different output.We performed variant calling with respect to single nucleotide variants and short indels with allelic frequencies as low as 1%, considering eight open-source tools: GATK HaplotypeCaller, Platypus, VarScan, LoFreq, FreeBayes, SNVer, SAMtools and VarDict. We analyzed two sets of sequencing data of patients with myelodysplastic syndrome (MDS). The first set covers 54 Illumina HiSeq samples, the second set covers 111 Illumina NextSeq samples. Validation of all calls was achieved by re-sequencing on the same platform, on a different platform and expert based review. In addition, we analyzed two sets of simulated data with varying coverages and error profiles, covering 50 samples each. In all cases we evaluated an identical target region consisting of 19 genes (42,322 bp) known to be recurrently mutated in MDS.Our evaluation shows that variant calling – even of single nucleotide variants and short indels – remains challenging. Validated mutations were missed by every tool. High sensitivity usually went along with low precision. Reproducible results could not be obtained in multithreading-mode. Influence of simulated varying coverages and background noise on variant calling was generally low. Considering both real- and simulated data sets, VarDict performed best.

  15. Heteroplasmy Benchmark Dataset - mitochondrial DNA mixture model - MiSeq -...

    • zenodo.org
    bin
    Updated Dec 31, 2020
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Federica Fazzini; Liane Fendt; Lukas Forer; Sebastian Schönherr; Jamie Lee Losso; Gertraud Streiter; Bernd Schöpf; Anita Kloss-Brandstätter; Florian Kronenberg; Hansi Weissensteiner; Hansi Weissensteiner; Federica Fazzini; Liane Fendt; Lukas Forer; Sebastian Schönherr; Jamie Lee Losso; Gertraud Streiter; Bernd Schöpf; Anita Kloss-Brandstätter; Florian Kronenberg (2020). Heteroplasmy Benchmark Dataset - mitochondrial DNA mixture model - MiSeq - U5-H1-M1-M2-M3-M4-M5 - BAM [Dataset]. http://doi.org/10.5281/zenodo.4001424
    Explore at:
    binAvailable download formats
    Dataset updated
    Dec 31, 2020
    Dataset provided by
    Zenodohttp://zenodo.org/
    Authors
    Federica Fazzini; Liane Fendt; Lukas Forer; Sebastian Schönherr; Jamie Lee Losso; Gertraud Streiter; Bernd Schöpf; Anita Kloss-Brandstätter; Florian Kronenberg; Hansi Weissensteiner; Hansi Weissensteiner; Federica Fazzini; Liane Fendt; Lukas Forer; Sebastian Schönherr; Jamie Lee Losso; Gertraud Streiter; Bernd Schöpf; Anita Kloss-Brandstätter; Florian Kronenberg
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Description

    mtDNA mixture model of 2 mtDNA sequences belonging to haplogroups U5 and H1. Run on Illumina MiSeq with 3 different polymerases (Clontech, Herculase, NEB Taq), and different DNA extraction protocols - BAM FILES

    M2 = Mixture 1:10 i.e. 10%

    M3 = Mixture 1:50 i.e. 2%

    M4 = Mixture 1:100 i.e. 1%

    M5 = Mixture 1:200 i.e. 0.5%

  16. d

    Firn Density and Stratigraphy Observations from USGS Benchmark Glaciers

    • catalog.data.gov
    • data.usgs.gov
    Updated Jul 6, 2024
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    U.S. Geological Survey (2024). Firn Density and Stratigraphy Observations from USGS Benchmark Glaciers [Dataset]. https://catalog.data.gov/dataset/firn-density-and-stratigraphy-observations-from-usgs-benchmark-glaciers
    Explore at:
    Dataset updated
    Jul 6, 2024
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Description

    This dataset contains observations of snow and firn density and stratigraphy from Site EC on Wolverine Glacier. Site EC is located in the accumulation zone on the northwest flank of the upper glacier at 1350m. Cores were recovered using a FELICS corer to approximately 25m depth at the end of the accumulation season and the end of ablation season starting in 2016. Additional cores were drilled throughout the ablation seasons of 2016 and 2017. The cores were processed in the field. The dataset includes depth-density profiles, ice-lens stratigraphy, and annual-layer depths. Density was calculated by measuring the mass and length of each core section (the corer retrieves cores with uniform diameter, which was measured on randomly selected core sections). Ice lenses were identified by visual inspection. Annual layer depths were determined by identifying dark layers in the core, which are interpreted to be the end-of-melt-season surfaces.

  17. d

    Single-Beam Bathymetry Data Collected in 2015 nearshore Dauphin Island,...

    • search.dataone.org
    • catalog.data.gov
    • +1more
    Updated Sep 14, 2017
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    U.S. Geological Survey (2017). Single-Beam Bathymetry Data Collected in 2015 nearshore Dauphin Island, Alabama, U.S. Geological Survey (USGS). This metadata file is specific to the International Reference Frame 2000 (ITRF00) xyz point data. [Dataset]. https://search.dataone.org/view/8349ed16-4ae4-4712-b42d-fc916be9dff4
    Explore at:
    Dataset updated
    Sep 14, 2017
    Dataset provided by
    United States Geological Surveyhttp://www.usgs.gov/
    Authors
    U.S. Geological Survey
    Time period covered
    Aug 19, 2015 - Aug 25, 2015
    Area covered
    Variables measured
    DOY, FID, Boat, Year, Shape, Lenth_m, GPS_Week, ITRF00_X, ITRF00_Y, USGS_FAN, and 5 more
    Description

    Dauphin Island, Alabama is a barrier island located in the Gulf of Mexico that supports local residence, tourism, commercial infrastructure, and the historical Fort Gaines. During the past decade the island has been impacted by several major hurricanes (Ivan, 2004; Katrina, 2005; Isaac 2012). Storms along with sea level rise, presents a continued threat to island stability. State and federal managers are taking a scientific investigative approach to identify the best options available to formulate and implement a long-term plan to properly restore Dauphin Island and provide resilience against future storms and sea-level rise. Island morphology, including current bathymetry data, is one of several aspects being investigated and funded through a grant from National Fish and Wildlife Foundation Gulf Environmental Benefit Fund. In August 2015, the United States Geological Survey Saint Petersburg Coastal and Marine Science Center (USGS SPCMSC) in cooperation with the United States Army Corps of Engineers (USACE) and the state of Alabama conducted bathymetric surveys of the nearshore waters surrounding Dauphin Island. This data release provides 1,165-line kilometers (km) of processed single-beam bathymetry (SBB) data collected by the USGS SPCMSC in August 2015 (Field Activity Number [FAN] 2015-326-FA). Data were acquired aboard 4 separate survey vessels; the RV Sallenger (subFAN, 15BIM10), the RV Jabba Jaw (subFAN, 15BIM11), the RV Shark (subFAN, 15BIM12), and the RV Chum (subFAN, 15BIM13). The data are provided in three datums: 1) the International Terrestrial Reference Frame of 2000 (ITRF00), ellipsoid height (-47.04 meters [m] to -29.36 m); 2) the North American Datum of 1983, realization of CORS96 (NAD83 (CORS96)) horizontal, and the North American Vertical Datum 1988 (NAVD88) vertical (-0.24 m to -17.33 m); and 3) the NAD83 (CORS96) horizontal, and Mean Lower Low Water (MLLW) vertical (-0.12 m to -17.93 m). Additional files include trackline shapefiles, digital and handwritten Field Activity Collection Systems (FACS) logs, a comprehensive 50-meter Digital Elevation Model (DEM), and formal Federal Geographic Data Committee (FGDC) metadata.

  18. d

    tijuanadem

    • catalog.data.gov
    • datasets.ai
    Updated Jun 15, 2024
    + more versions
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Climate Adaptation Science Centers (2024). tijuanadem [Dataset]. https://catalog.data.gov/dataset/tijuanadem-6beb7
    Explore at:
    Dataset updated
    Jun 15, 2024
    Dataset provided by
    Climate Adaptation Science Centers
    Description

    To assess the current topography of the tidal marshes we conducted survey-grade elevation surveys at all sites between 2009 and 2013 using a Leica RX1200 Real Time Kinematic (RTK)Global Positioning System (GPS) rover (±1 cm horizontal, ±2 cm vertical accuracy; Leica Geosystems Inc., Norcross, GA; Figure 4). At sites with RTK network coverage (San Pablo, Petaluma, Pt. Mugu, and Newport), rover positions were received in real time from the Leica Smartnet system via a CDMA modem (www.lecia-geosystems.com). At sites without network coverage (Humboldt, Bolinas, Morro and Tijuana), rover positions were received in real time from a Leica GS10 antenna base station via radio link. When using the base station, we adjusted all elevation measurements using an OPUS correction (www.ngs.noaa.gov/OPUS). We used the WGS84 ellipsoid model for vertical and horizontal positioning. We verified rover accuracy and precision by measuring positions at local National Geodetic Survey (NGS) benchmarks and temporary benchmarks established at each site (Table 1). Average measured vertical errors at benchmarks were 1-2 cm throughout the study, comparable to the stated error of the GPS. At each site, we surveyed marsh surface elevation along transects oriented perpendicular to the major tidal sediment source, with a survey point taken every 12.5 m; 50 m separated transect lines. We used the Geoid09 model to calculate orthometric heights from ellipsoid values (m, NAVD88; North American Vertical Datum of 1988) and projected all points to NAD83 UTM zone 10 or zone 11 using Leica GeoOffice (Leica Geosystems Inc, Norcross, GA, v. 7.0.1).We synthesized the elevation survey data to create a digital elevation model (DEM) at each site in ArcGIS 10.2.1 Spatial Analyst (ESRI 2013; Redlands, CA) with exponential ordinary kriging methods (5 x 5 mcell size) after adjusting model parameters to minimize the root-mean-square error (RMS). We used elevation models as the baseline conditions for subsequent analyses in this study including tidal inundation patterns, SLR response modeling, and mapping of sites by specific elevation (flooding) zones.

  19. Twist Whole-Exome Sequencing Dataset - High Coverage - WGGC SIG4...

    • zenodo.org
    application/gzip, txt
    Updated May 5, 2023
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    Sugirtahn Sivalingam; Sugirtahn Sivalingam (2023). Twist Whole-Exome Sequencing Dataset - High Coverage - WGGC SIG4 Benchmarking [Dataset]. http://doi.org/10.5281/zenodo.7075041
    Explore at:
    application/gzip, txtAvailable download formats
    Dataset updated
    May 5, 2023
    Dataset provided by
    Zenodohttp://zenodo.org/
    Authors
    Sugirtahn Sivalingam; Sugirtahn Sivalingam
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Description

    GIAB Reference Genome for Benchmarking Initiatives in the West German Genome Center (WGGC) - SIG4.

    Twist Whole-Exome Sequencing Dataset - High Coverage - 200M Reads.

  20. Geodetic Survey Water Level Observations

    • data.wu.ac.at
    • data.cnra.ca.gov
    • +1more
    html, xml
    Updated Feb 8, 2018
    Share
    FacebookFacebook
    TwitterTwitter
    Email
    Click to copy link
    Link copied
    Close
    Cite
    National Oceanic and Atmospheric Administration, Department of Commerce (2018). Geodetic Survey Water Level Observations [Dataset]. https://data.wu.ac.at/schema/data_gov/YThlMTY3MDAtMDk4Zi00MTg4LWFhYjAtMmNmNmFhNDRiOGRk
    Explore at:
    xml, htmlAvailable download formats
    Dataset updated
    Feb 8, 2018
    Dataset provided by
    National Oceanic and Atmospheric Administrationhttp://www.noaa.gov/
    License

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

    Area covered
    03fcde6f5924af47ce92188a215b548ebbd15a06
    Description

    Over one million images of National Coast & Geodetic Survey (now NOAA's National Geodetic Survey/NGS) forms captured from microfiche. Tabular forms and charts document tidal means and extremes, benchmarks, tabulations and compared readings. Period of record is 1822-1994. Scanned under the Climate Database Modernization Program.

Share
FacebookFacebook
TwitterTwitter
Email
Click to copy link
Link copied
Close
Cite
County of Volusia (2024). NGS Benchmarks [Dataset]. https://opendata-volusiacountyfl.hub.arcgis.com/datasets/ngs-benchmarks

NGS Benchmarks

Explore at:
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

Search
Clear search
Close search
Google apps
Main menu