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These polygon datasets represent the jurisdictional park boundaries for the National Park Service (NPS) units in the District of Columbia. These boundaries are somewhat equivalent to tract data whereby individually legislated areas are maintained as separate polygons. For a dataset where those polygons are dissolved for a cleaner appearance on maps, see Park Management (Jurisdictional) Boundaries, National Capital Region NPS (https://irma.nps.gov/DataStore/Reference/Profile/2305168). These boundaries identify the land the is owned and managed by the NPS including which NPS administrative unit manages it. This boundary is equivalent to the type of boundary that is displayed on park brochure maps.

These polygon datasets represent the jurisdictional park boundaries for the National Park Service (NPS) units in the District of Columbia. These boundaries are somewhat equivalent to tract data whereby individually legislated areas are maintained as separate polygons. For a dataset where those polygons are dissolved for a cleaner appearance on maps, see Park Management (Jurisdictional) Boundaries, National Capital Region NPS (https://irma.nps.gov/DataStore/Reference/Profile/2305168). These boundaries identify the land the is owned and managed by the NPS including which NPS administrative unit manages it. This boundary is equivalent to the type of boundary that is displayed on park brochure maps.

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The Digital Geologic Map of George Washington Memorial Parkway and parks in the National Capital Area, Virginia, Maryland, and the District of Columbia 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 and Maryland 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 (gwmp_metadata.txt; available at http://nrdata.nps.gov/gwmp/nrdata/geology/gis/gwmp_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 (gwmp_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 George Washington Memorial Parkway, Rock Creek Park, National Capital Parks-East, Greenbelt Park and Chesapeake and Ohio Canal National Historical Park.

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These ESRI shape files are of National Park Service tract and boundary data that was created by the Land Resources Division. Tracts are numbered and created by the regional cartographic staff at the Land Resources Program Centers and are associated to the Land Status Maps. This data should be used to display properties that NPS owns and properties that NPS may have some type of interest such as scenic easements or right of ways.

These ESRI shape files are of National Park Service tract and boundary data that was created by the Land Resources Division. Tracts are numbered and created by the regional cartographic staff at the Land Resources Program Centers and are associated to the Land Status Maps. This data should be used to display properties that NPS owns and properties that NPS may have some type of interest such as scenic easements or right of ways.

L'Enfant Plan of Washington. The dataset contains polygons representing the L'Enfant Plan historic district, created as part of the DC Geographic Information System (DC GIS) for the D.C. Office of the Chief Technology Officer (OCTO) and participating D.C. government agencies. This district was identified from public records, including published maps and the National Register nomination form. It was created by buffering along the planimetric street centerline at specified distances, as referenced in the 1803 King Plats, ranging from 70 to 160 feet.