88 datasets found
  1. m

    Maryland Property Data - Tax Map Grids

    • data.imap.maryland.gov
    • hub.arcgis.com
    • +2more
    Updated Apr 1, 2016
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    ArcGIS Online for Maryland (2016). Maryland Property Data - Tax Map Grids [Dataset]. https://data.imap.maryland.gov/datasets/maryland-property-data-tax-map-grids
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    Dataset updated
    Apr 1, 2016
    Dataset authored and provided by
    ArcGIS Online for Maryland
    Area covered
    Description

    This layer contains the boundaries and IDs of the Maryland tax maps produced by Maryland Department of Planning. Tax maps, also known as assessment maps, property maps or parcel maps, are a graphic representation of real property showing and defining individual property boundaries in relationship to contiguous real property.This is a MD iMAP hosted service layer. Find more information at https://imap.maryland.gov.Feature Service Layer Link:https://mdgeodata.md.gov/imap/rest/services/PlanningCadastre/MD_PropertyData/MapServer/2

  2. a

    Maryland Property Data - Tax Maps Image Service

    • data-maryland.opendata.arcgis.com
    • data.imap.maryland.gov
    • +1more
    Updated Sep 1, 2017
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    ArcGIS Online for Maryland (2017). Maryland Property Data - Tax Maps Image Service [Dataset]. https://data-maryland.opendata.arcgis.com/datasets/351ef2fd456942919a5c1641608e8197
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    Dataset updated
    Sep 1, 2017
    Dataset authored and provided by
    ArcGIS Online for Maryland
    Area covered
    Description

    This Image Service of Maryland Property Data allows for the manipulation of the display properties of the Statewide Tax Maps dataset. This is a MD iMAP hosted service. Find more information at https://imap.maryland.gov.Image Service Link: https://mdgeodata.md.gov/imap/rest/services/PlanningCadastre/MD_PropertyData/ImageServer

  3. m

    Maryland Property Data - Tax Maps

    • data.imap.maryland.gov
    • data-maryland.opendata.arcgis.com
    • +1more
    Updated Apr 1, 2016
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    ArcGIS Online for Maryland (2016). Maryland Property Data - Tax Maps [Dataset]. https://data.imap.maryland.gov/maps/maryland::maryland-property-data-tax-maps
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    Dataset updated
    Apr 1, 2016
    Dataset authored and provided by
    ArcGIS Online for Maryland
    Area covered
    Description

    This is a MD iMAP hosted service layer. Find more information at https://imap.maryland.gov.Feature Service Layer Link:https://mdgeodata.md.gov/imap/rest/services/PlanningCadastre/MD_PropertyData/MapServer/1

  4. d

    MD iMAP: Maryland Property Data - Tax Map Grids

    • catalog.data.gov
    • cloud.csiss.gmu.edu
    • +4more
    Updated May 10, 2025
    + more versions
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    opendata.maryland.gov (2025). MD iMAP: Maryland Property Data - Tax Map Grids [Dataset]. https://catalog.data.gov/dataset/md-imap-maryland-property-data-tax-map-grids
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    Dataset updated
    May 10, 2025
    Dataset provided by
    opendata.maryland.gov
    Area covered
    Maryland
    Description

    This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. This layer contains the boundaries and IDs of the Maryland tax maps produced by Maryland Department of Planning. Tax maps - also known as assessment maps - property maps or parcel maps - are a graphic representation of real property showing and defining individual property boundaries in relationship to contiguous real property. Last Updated: Feature Service Layer Link: https://mdgeodata.md.gov/imap/rest/services/PlanningCadastre/MD_PropertyData/MapServer ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively "the Data") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

  5. d

    Tax Maps

    • catalog.data.gov
    • opendata.maryland.gov
    Updated Aug 2, 2025
    + more versions
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    opendata.maryland.gov (2025). Tax Maps [Dataset]. https://catalog.data.gov/dataset/tax-maps
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    Dataset updated
    Aug 2, 2025
    Dataset provided by
    opendata.maryland.gov
    Description

    Tax Maps and other affiliated layers. The comprehensive point theme incorporates parcel ownership and address information, parcel valuation information and basic information about the land and structure(s) associated with a given tax assessment account. Data for the Parcel point theme are obtained from the State Department of Assessments and Taxation with added data from Maryland Department of Planning. The date the point was most recently published in Planning's data products MdProperty View and FINDER Quantum is contained in the mdpvdate field. The date of the most recent Assessments data linkage to MdProperty View/FINDER Quantum points is contained in the sdatdate field. Accounts deleted between those two dates are no longer represented as points. For more information on the attribute definitions, please see the MdProperty View User's Guide, available for download at https://planning.maryland.gov/Pages/OurProducts/DownloadFiles.aspx . Tax maps, also known as assessments, property or parcel maps, are a graphic representation of real property showing and defining individual property boundaries in relationship to contiguous real property. The primary purpose of these maps is to help State tax assessors locate properties for assessments and taxation purposes. The maps contained herein are NOT to be construed or used as a "legal description". It is not a survey product and not to be used for the design, modification or construction of improvements to real property or for flood plain determination. Planning does not provide any guarantee of accuracy or completeness regarding the map information. Any errors or omissions should be reported to the Maryland Department of Planning Property Mapping Unit. In no event will Planning or the State of Maryland be liable for any damages, including but not limited to loss of data, lost profits, business interruption, loss of business information or any other pecuniary loss that might arise from the use of this map or information it contains. This is a MD iMAP hosted service layer. Find more information at https://imap.maryland.gov

  6. Maryland Parcel Boundaries

    • data-maryland.opendata.arcgis.com
    • data.imap.maryland.gov
    • +1more
    Updated Sep 2, 2002
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    ArcGIS Online for Maryland (2002). Maryland Parcel Boundaries [Dataset]. https://data-maryland.opendata.arcgis.com/datasets/maryland::maryland-parcel-boundaries/about
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    Dataset updated
    Sep 2, 2002
    Dataset provided by
    https://arcgis.com/
    Authors
    ArcGIS Online for Maryland
    Area covered
    Description

    This dataset contains parcel polygons of the entire state. Minimum attributes are available. This data is used to make a cached map service. For more information see https://planning.maryland.gov/pdf/OurProducts/propertyMapProducts/mdpusr.pdfThe parcel polygons can be downloaded from the Maryland Department of Planning's website at https://planning.maryland.gov/Pages/OurProducts/DownloadFiles.aspx.Map Service Link:https://mdgeodata.md.gov/imap/rest/services/PlanningCadastre/MD_ParcelBoundaries/MapServer/0This is a MD iMAP hosted service. Find more information at https://imap.maryland.gov.

  7. a

    Annapolis City Tax Map Index

    • opendata.aacounty.org
    • hub.arcgis.com
    Updated Jan 11, 2020
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    Anne Arundel County, MD (2020). Annapolis City Tax Map Index [Dataset]. https://opendata.aacounty.org/maps/annapolis-city-tax-map-index
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    Dataset updated
    Jan 11, 2020
    Dataset authored and provided by
    Anne Arundel County, MD
    Area covered
    Description

    Index of Annapolis tax maps

  8. Index Grids, Property Map Index for Tax Maps. 1"=600' grid and larger scale...

    • data.wu.ac.at
    html
    Updated Aug 19, 2017
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    NSGIC State | GIS Inventory (2017). Index Grids, Property Map Index for Tax Maps. 1"=600' grid and larger scale insert grids for selected counties., Published in 2010, 1:7200 (1in=600ft) scale, Maryland Department of Planning. [Dataset]. https://data.wu.ac.at/schema/data_gov/NmRlYjI3YTQtZWNhZi00OTAzLTljMmMtNjkyNGJjMDMwNWI2
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    htmlAvailable download formats
    Dataset updated
    Aug 19, 2017
    Dataset provided by
    National States Geographic Information Council
    Area covered
    974b246e50d305ccbcb8d460bc98fd4468f99fce
    Description

    Index Grids dataset current as of 2010. Property Map Index for Tax Maps. 1"=600' grid and larger scale insert grids for selected counties..

  9. d

    Digital Geologic-GIS Map of the Port Tobacco Quadrangle, Maryland (NPS, GRD,...

    • datasets.ai
    • catalog.data.gov
    33, 57
    Updated Sep 1, 2024
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    Department of the Interior (2024). Digital Geologic-GIS Map of the Port Tobacco Quadrangle, Maryland (NPS, GRD, GRI, THST, POTO digital map) adapted from a Maryland Geological Survey Quadrangle Geologic Map by Glaser (1984) [Dataset]. https://datasets.ai/datasets/digital-geologic-gis-map-of-the-port-tobacco-quadrangle-maryland-nps-grd-gri-thst-poto-dig
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    33, 57Available download formats
    Dataset updated
    Sep 1, 2024
    Dataset authored and provided by
    Department of the Interior
    Area covered
    Port Tobacco, Maryland
    Description

    The Digital Geologic-GIS Map of the Port Tobacco Quadrangle, Maryland 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 (poto_geology.gdb), and a 2.) Open Geospatial Consortium (OGC) geopackage. The file geodatabase format is supported with a 1.) ArcGIS Pro map file (.mapx) file (poto_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 (poto_geology.mxd) and individual 10.1 layer (.lyr) files (for each GIS data layer). 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 GIS readme file (thst_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (thst_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 (poto_geology_metadata_faq.pdf). Please read the thst_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: 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: Maryland 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 (poto_geology_metadata.txt or poto_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, 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. K

    Anne Arundel County, Maryland Parcels

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Dec 4, 2018
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    Anne Arundel County, Maryland (2018). Anne Arundel County, Maryland Parcels [Dataset]. https://koordinates.com/layer/98914-anne-arundel-county-maryland-parcels/
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    pdf, geopackage / sqlite, shapefile, geodatabase, mapinfo mif, mapinfo tab, csv, dwg, kmlAvailable download formats
    Dataset updated
    Dec 4, 2018
    Dataset authored and provided by
    Anne Arundel County, Maryland
    Area covered
    Description

    Vector polygon map data of property parcels from Anne Arundel County, Maryland containing 237,918 features.

    ​

    Property parcel GIS map data consists of detailed information about individual land parcels, including their boundaries, ownership details, and geographic coordinates.

    ​

    Property parcel data can be used to analyze and visualize land-related information for purposes such as real estate assessment, urban planning, or environmental management.

    ​

    Available for viewing and sharing as a map in a Koordinates map viewer. This data is also available for export to DWG for CAD, PDF, KML, CSV, and GIS data formats, including Shapefile, MapInfo, and Geodatabase.

  11. b

    Real Property Information

    • data.baltimorecity.gov
    Updated Mar 23, 2022
    + more versions
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    Baltimore City (2022). Real Property Information [Dataset]. https://data.baltimorecity.gov/maps/baltimore::real-property-information-2
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    Dataset updated
    Mar 23, 2022
    Dataset authored and provided by
    Baltimore City
    License

    Attribution 3.0 (CC BY 3.0)https://creativecommons.org/licenses/by/3.0/
    License information was derived automatically

    Area covered
    Description

    This dataset represents real property information within a parcel of land in the City of Baltimore. The data dictionary for this dataset can be accessed by visiting the following link.: Data Dictionary For Real Property Information | Open Baltimore (baltimorecity.gov). Data is updated on a weekly basis. To leave feedback or ask a question about this dataset, please fill out the following form: Real Property Information feedback form.

  12. d

    MD iMAP: Maryland Political Boundaries - ZIP Codes

    • catalog.data.gov
    • opendata.maryland.gov
    • +3more
    Updated May 10, 2025
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    opendata.maryland.gov (2025). MD iMAP: Maryland Political Boundaries - ZIP Codes [Dataset]. https://catalog.data.gov/dataset/md-imap-maryland-political-boundaries-zip-codes
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    Dataset updated
    May 10, 2025
    Dataset provided by
    opendata.maryland.gov
    Area covered
    Maryland
    Description

    This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov. In 1993 - the Maryland Department of Planning and the Maryland State Highway Administration entered into a Data Base Usage Agreement with Bell Atlantic and Data Chromatics - Inc. to develop an enhanced street address map for Maryland. ZIP Code boundary area files were one of the products derived from this partnership. The resulting boundary area files were intended to improve the cartographic quality and accuracy of the ZIP code boundary area files derived from the U.S. Census Bureau's post 1990 Census TIGER\Line Files (based on the Census Bureau's ZIP code tabulation areas - ZCTAs). Subsequent iterative improvements to the ZIP Code boundary area files have been made using premise address information associated with mapped parcel records as provided in the Maryland Department of Planning's MdProperty View GIS tax map and parcel record DVD product. The resulting files are meant to serve as a good approximation"" of ZIP codes as polygons (which in reality they are not) but are not official ZIP Code maps and are not meant to be a substitute for any products offered by the U.S. Postal Service - the official source for ZIP code information. While there are no restrictions on their use we do recommend that they are best used with MdProperty View and that MDP makes no guarantee or warranty regarding the files. Last Updated: 2012Feature Service Link:https://mdgeodata.md.gov/imap/rest/services/Boundaries/MD_PoliticalBoundaries/FeatureServer ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively the ""Data"") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

  13. d

    Department of Finance Digital Tax Map.

    • datadiscoverystudio.org
    • data.cityofnewyork.us
    • +3more
    Updated Jun 6, 2018
    + more versions
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    (2018). Department of Finance Digital Tax Map. [Dataset]. http://datadiscoverystudio.org/geoportal/rest/metadata/item/55d40e6ff0134302ba735f86d3b72548/html
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    Dataset updated
    Jun 6, 2018
    Description

    description: The official tax maps for the City of New York are maintained by the DEPARTMENT OF FINANCE Tax Map Office. Tax maps show the lot lines, the block and lot numbers, the street names, lot dimensions, and easements. Please see the following link for additional documentation- https://github.com/CityOfNewYork/nyc-geo-metadata/blob/master/Metadata/Metadata_DigitalTaxMap.md; abstract: The official tax maps for the City of New York are maintained by the DEPARTMENT OF FINANCE Tax Map Office. Tax maps show the lot lines, the block and lot numbers, the street names, lot dimensions, and easements. Please see the following link for additional documentation- https://github.com/CityOfNewYork/nyc-geo-metadata/blob/master/Metadata/Metadata_DigitalTaxMap.md

  14. O

    Carroll County Real Property Assessments: Hidden Property Owner Names

    • opendata.maryland.gov
    Updated Aug 5, 2025
    + more versions
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    SDAT (State Department of Assessments and Taxation) and MDP (Maryland Department of Planning) (2025). Carroll County Real Property Assessments: Hidden Property Owner Names [Dataset]. https://opendata.maryland.gov/Business-and-Economy/Carroll-County-Real-Property-Assessments-Hidden-Pr/h6dw-jc8j
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    csv, application/rdfxml, tsv, application/rssxml, xml, kmz, application/geo+json, kmlAvailable download formats
    Dataset updated
    Aug 5, 2025
    Dataset authored and provided by
    SDAT (State Department of Assessments and Taxation) and MDP (Maryland Department of Planning)
    License

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

    Description

    Please read all metadata before accessing the dataset. Note that records shown here are updated at different frequencies from data in products from MDP and SDAT. Please see the full documentation at https://opendata.maryland.gov/api/views/ed4q-f8tm/files/WtRzMltUzm25OasOCYtu7PgOGUfrplWsZTalSH4Iukg?download=true&filename=Real%20Property%20Records%20Documentation.pdf and review the dedicated metadata site (https://opendata.maryland.gov/dataset/Beta-Maryland-Statewide-Real-Property-Assessments-/ed4q-f8tm/about).

  15. MDOT SHA Right-Of-Way (Polygons)

    • hub.arcgis.com
    • data.imap.maryland.gov
    • +1more
    Updated Apr 6, 2022
    + more versions
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    ArcGIS Online for Maryland (2022). MDOT SHA Right-Of-Way (Polygons) [Dataset]. https://hub.arcgis.com/datasets/6b9156c1986640f1a87efacee03e20f5
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    Dataset updated
    Apr 6, 2022
    Dataset provided by
    https://arcgis.com/
    Authors
    ArcGIS Online for Maryland
    Area covered
    Description

    This is a publicly available map image service with limited GIS attributes. A downloadable version of this data is now available through the MDOT GIS Open Data Portal: Download MDOT SHA Right-of-Way Polygons (Open Data Portal) The following related versions of this data are available here:MDOT SHA Right-of-Way (Secured)Line dataFull attribute tableAccessible to only MDOT employees and contractors upon requestMDOT SHA Right-of-Way (Map Image Service)Read-only map serviceLine dataLimited attributes (quality level)Accessible to publicMDOT SHA Right-of-Way data is a composite layer of PSD field-collected survey sources, PSD in-house computations, traced PSD hardcopy materials, and historical Maryland Department of Planning (MDP) parcel boundaries.This data product was intended to replace MDOT SHA Planning Level Right-of-Way (Tax Map Legacy), which is an increasingly obsolete legacy product for MDOT SHA Right-of-Way information that in some areas remains the most comprehensive. For continuity, many MDP parcel boundaries found in MDOT SHA Planning Level Right-of-Way (Tax Map Legacy) have been incorporated into MDOT SHA Right-of-Way data with an "Estimated" quality level. Please see below for a description of the primary attribute.-----------------------------------------------------The polygons in this layer are divided into 318 arbitrary grid zones across the State of Maryland. Updates to the parent ROW boundary line data set [MDOT SHA Right-of-Way (Secured)] are made by grid and reflected in this polygon layer.For more information or to report errors in this data, please contact MDOT SHA OIT Enterprise Information Services:Email: GIS@mdot.maryland.gov

  16. m

    Maryland LiDAR Caroline County - Aspect

    • data.imap.maryland.gov
    • hub.arcgis.com
    • +1more
    Updated Jan 1, 2013
    + more versions
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    ArcGIS Online for Maryland (2013). Maryland LiDAR Caroline County - Aspect [Dataset]. https://data.imap.maryland.gov/datasets/b6e804821a874a66889585bdb0919d66
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    Dataset updated
    Jan 1, 2013
    Dataset authored and provided by
    ArcGIS Online for Maryland
    Area covered
    Description

    Geographic Extent: SANDY_Restoration_DE_MD_QL2 Area of Interest covers approximately 3.096 square miles. Lot #5 contains the full project area Dataset Description: The SANDY_Restoration_DE_MD_QL2 project called for the Planning, Acquisition, processing and derivative products of LIDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1. The data was developed based on a horizontal projection/datum of State Plane Zone Maryland (1900), NAD83, feet and vertical datum of NAVD1988 (GEOID12A), feet. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.2 Files formatted to 3842 individual 1500m x 1500m tiles, and corresponding Intensity Images and Bare Earth DEMs tiled to the same 1500m x 1500m schema, and Breaklines in ESRI shapefile format. Ground Conditions: LiDAR was collected in Winter 2013 / Spring 2014, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications, Quantum Spatial established a total of 78 QA control points and 99 Land Cover control points that were used to calibrate the LIDAR to known ground locations established throughout the SANDY_Restoration_DE_MD_QL2 project area.This is a MD iMAP hosted service. Find more information at https://imap.maryland.gov.Image Service Link: https://mdgeodata.md.gov/lidar/rest/services/Caroline/MD_caroline_aspect_m/ImageServer

  17. Digital Geologic-GIS Map of Thomas Stone National Historic Site and...

    • catalog.data.gov
    • datasets.ai
    • +1more
    Updated May 18, 2025
    + more versions
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    National Park Service (2025). Digital Geologic-GIS Map of Thomas Stone National Historic Site and Vicinity, Maryland and Virginia (NPS, GRD, GRI, THST, THST digital map) adapted from a U.S. Geological Survey Geologic Investigations Series Map by Mixon et al. (2000), and a Maryland Geological Survey Quadrangle Geologic Map by Glaser (1984) [Dataset]. https://catalog.data.gov/dataset/digital-geologic-gis-map-of-thomas-stone-national-historic-site-and-vicinity-maryland-and-
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    Dataset updated
    May 18, 2025
    Dataset provided by
    National Park Servicehttp://www.nps.gov/
    Area covered
    Maryland
    Description

    The Digital Geologic-GIS Map of Thomas Stone National Historic Site and Vicinity, Maryland and Virginia 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 (thst_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 (thst_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 (thst_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 GIS readme file (thst_geology_gis_readme.pdf), 2.) the GRI ancillary map information document (.pdf) file (thst_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 (thst_geology_metadata_faq.pdf). Please read the thst_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 and Maryland 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 (thst_geology_metadata.txt or thst_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 1:100,000 and United States National Map Accuracy Standards features are within (horizontally) 50.8 meters or 166.7 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).

  18. A

    DIGITAL FLOOD INSURANCE RATE MAP DATABASE, Cecil Co, MARYLAND

    • data.amerigeoss.org
    • cloud.csiss.gmu.edu
    • +2more
    Updated Aug 18, 2022
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    United States (2022). DIGITAL FLOOD INSURANCE RATE MAP DATABASE, Cecil Co, MARYLAND [Dataset]. https://data.amerigeoss.org/dataset/digital-flood-insurance-rate-map-database-cecil-co-maryland
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    Dataset updated
    Aug 18, 2022
    Dataset provided by
    United States
    Area covered
    Maryland
    Description

    The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the UTM projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.

  19. Digital Geomorphic Map of Assateague Island National Seashore, Maryland and...

    • catalog.data.gov
    • datasets.ai
    • +3more
    Updated Jun 5, 2024
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    National Park Service (2024). Digital Geomorphic Map of Assateague Island National Seashore, Maryland and Virginia (NPS, GRD, GRI, ASIS, ASIS digital map) [Dataset]. https://catalog.data.gov/dataset/digital-geomorphic-map-of-assateague-island-national-seashore-maryland-and-virginia-nps-gr
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    Dataset updated
    Jun 5, 2024
    Dataset provided by
    National Park Servicehttp://www.nps.gov/
    Area covered
    Maryland, Assateague Island
    Description

    The Digital Geomorphic Map of Assateague Island National Seashore, Maryland and Virginia is composed of GIS data layers complete with ArcMap 9.3 layer (.LYR) files, two ancillary GIS tables, a Map PDF document with ancillary map text, figures and tables, a FGDC metadata record and a 9.3 ArcMap (.MXD) Document that displays the digital map in 9.3 ArcGIS. The data were completed as a component of the Geologic Resources Inventory (GRI) program, a National Park Service (NPS) Inventory and Monitoring (I&M) 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 sections(s) of this metadata record (asis_metadata.txt; available at http://nrdata.nps.gov/asis/nrdata/geology/gis/asis_metadata.xml). All GIS and ancillary tables were produced as per the NPS GRI Geology-GIS Geodatabase Data Model v. 2.1. (available at: http://science.nature.nps.gov/im/inventory/geology/GeologyGISDataModel.cfm). The GIS data is available as a 9.3 personal geodatabase (asis_geology.mdb), and as shapefile (.SHP) and DBASEIV (.DBF) table files. The GIS data projection is NAD83, UTM Zone 18N. That data is within the area of interest of Assateague Island National Seashore.

  20. e

    GIS Shapefile, Assessments and Taxation Database, MD Property View 2003,...

    • portal.edirepository.org
    zip
    Updated Aug 28, 2017
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    Jarlath O'Neil-Dunne (2017). GIS Shapefile, Assessments and Taxation Database, MD Property View 2003, Baltimore City [Dataset]. http://doi.org/10.6073/pasta/86fb7facb36e1cadb10ad3f9b4791ca3
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    zip(94759 kilobyte)Available download formats
    Dataset updated
    Aug 28, 2017
    Dataset provided by
    EDI
    Authors
    Jarlath O'Neil-Dunne
    Time period covered
    Jan 1, 2007 - Dec 31, 2015
    Area covered
    Description

    This layer is a high-resolution tree canopy change-detection layer for Baltimore City, MD. It contains three tree-canopy classes for the period 2007-2015: (1) No Change; (2) Gain; and (3) Loss. It was created by extracting tree canopy from existing high-resolution land-cover maps for 2007 and 2015 and then comparing the mapped trees directly. Tree canopy that existed during both time periods was assigned to the No Change category while trees removed by development, storms, or disease were assigned to the Loss class. Trees planted during the interval were assigned to the Gain category, as were the edges of existing trees that expanded noticeably. Direct comparison was possible because both the 2007 and 2015 maps were created using object-based image analysis (OBIA) and included similar source datasets (LiDAR-derived surface models, multispectral imagery, and thematic GIS inputs). OBIA systems work by grouping pixels into meaningful objects based on their spectral and spatial properties, while taking into account boundaries imposed by existing vector datasets. Within the OBIA environment a rule-based expert system was designed to effectively mimic the process of manual image analysis by incorporating the elements of image interpretation (color/tone, texture, pattern, location, size, and shape) into the classification process. A series of morphological procedures were employed to insure that the end product is both accurate and cartographically pleasing. No accuracy assessment was conducted, but the dataset will be subjected to manual review and correction. 2006 LiDAR and 2014 LiDAR data was also used to assist in tree canopy change.

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ArcGIS Online for Maryland (2016). Maryland Property Data - Tax Map Grids [Dataset]. https://data.imap.maryland.gov/datasets/maryland-property-data-tax-map-grids

Maryland Property Data - Tax Map Grids

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Dataset updated
Apr 1, 2016
Dataset authored and provided by
ArcGIS Online for Maryland
Area covered
Description

This layer contains the boundaries and IDs of the Maryland tax maps produced by Maryland Department of Planning. Tax maps, also known as assessment maps, property maps or parcel maps, are a graphic representation of real property showing and defining individual property boundaries in relationship to contiguous real property.This is a MD iMAP hosted service layer. Find more information at https://imap.maryland.gov.Feature Service Layer Link:https://mdgeodata.md.gov/imap/rest/services/PlanningCadastre/MD_PropertyData/MapServer/2

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