Description: This dataset contains impervious surfaces within Prince George's County. Impervious surfaces are attributed by type. All remaining surfaces that do not fall under one of the 'Type' categories are classified as pervious. Impervious Surface features derived as a byproduct of the photogrammetric capture of planimetric features, for use in general mapping at a scale of 1:1200, using stereo imagery taken to satisfy creation of 6 inch ground pixel resolution orthophotography. The original data was developed using photography taken from March of 2009. It was then updated in 2014 using photography taken during March/April of 2014, and 2017.
Description: The Area of Primary Concern represents an area potentially visible from George Washington's Mount Vernon Estate (East Lawn), with the removal of forest cover and construction of buildings 36 feet high. The original analysis was performed by EDAW, Inc. in 1991 using GIS visual simulation, and was adjusted in 2007 by Michael G. Clarke, AICP using ArcView and 1:24,000 USGS topographic maps, enhanced by National Geographic (TOPO series). The accuracy of the Area of Primary Concern diminishes as the distance increases from Mt. Vernon. Field verification is required to confirm whether specific locations are within Mt. Vernon's viewshed.
Service Item Id: 6e0d04e9ad5e464092dd2e6de8912c37
Copyright Text: Michael G. Clarke, AICP
clarke@hughes.net
518.523.8224
Description: Natural Resource Inventories depict the existing features found on a tract of land prior to subdivision. They include all existing site features, historic features, and the regulated natural resources necessary to evaluate a site prior to development. Natural Resource Inventories are reviewed by the M-NCPPC EPS staff for signature approval. A signed NRI must accompany a preliminary plan application.
Description: Potential habitat layer for Forest Interior Dwelling Species in the State of Maryland. These data are only the results of a model depicting where FIDS habitat might occur based on certain criteria. These polygons have NOT been field tested or field verified for actual FIDS presence. Please reference GIS documentation for further geospatial details for FIDS. The Prince George's County Planning Department does not have the authority to release this data. Please contact the authoritative source for more information and to acquire the data.
Service Item Id: 6e0d04e9ad5e464092dd2e6de8912c37
Copyright Text: Maryland Department of Natural Resources, Wildlife and Heritage Service, Towson University, Center for GIS
Description: The statewide vector file shows buffered areas that primarily contain habitat for rare, threatened, and endangered species and rare natural community types. It was created over USGS 7.5 minute topographic quadrangle maps and it generally includes, but does not specifically delineate, such regulated areas as Natural Heritage Areas, Wetlands of Special State Concern, Colonial Waterbird Colonies, and Habitat Protection Areas. Version 1 also included Waterfowl Concentration and Staging Areas, but these areas have not been included in subsequent versions. The file is best displayed by the "Group" attribute. The Prince George's County Planning Department does not have the authority to release this data. Please contact the authoritative source for more information and to acquire the data.
Description: Slope in percentage derived from contour data, divided into blocks, and converted to elevation rasters. Percent slope rasters were created from the elevation rasters, reclassified to show slope values of 15 - 25 percent, and 25 + percent, then recombined into one new raster. Results were compared with legacy data, ensuring accuracy. This data was captured for use in general mapping at a scale of 1:1200.
Description: This data set is a digital soil survey and generally is the most detailed level of soil geographic data developed by the National Cooperative Soil Survey. The information was prepared by digitizing maps, by compiling information onto a planimetric correct base and digitizing, or by revising digitized maps using remotely sensed and other information. This data set consists of georeferenced digital map data and computerized attribute data. The map data are in a soil survey area extent format and include a detailed, field verified inventory of soils and miscellaneous areas that normally occur in a repeatable pattern on the landscape and that can be cartographically shown at the scale mapped. A special soil features layer (point and line features) is optional. This layer displays the location of features too small to delineate at the mapping scale, but they are large enough and contrasting enough to significantly influence use and management. The soil map units are linked to attributes in the National Soil Information System relational database, which gives the proportionate extent of the component soils and their properties.
Description: This dataset contains dams, headwalls, floodwalls, bulkheads, canals, water cooling channels, drainage connectors, and single line streams within Prince George's County. Canals, water cooling channels, and streams that run below elevated structures or underground are shown with a hidden feature code. Single line streams are those that are less than 20 feet in width. Centerlines of streams greater than 20 feet in width are shown with a separate feature code. Dams in this layer include those smaller ones found in creeks. This data was captured for use in general mapping at a scale of 1:1200.
Description: This dataset contains woodlands greater than 5000 square feet or one tenth of an acre within Prince George's County. The dripline of wooded areas was captured so it may run through other features. This data was captured for use in general mapping at a scale of 1:1200.
Description: This data set displays the location of the properties exempted from the requirements of the Woodland Consrvation Ordinacne due to having been issued a Numbered Exemption.
Description: This watershed data was acquired from Prince George's County Department of Environmental Resources (DER). The boundaries were originally developed by a contractor working DER as part of the GIS based Watershed Planning System (WPS) prior to 2001. The WPS project was developed to quickly assess watershed characteristics and the potential impact of certain pollutants.
Description: This file (SWSHED12) is a countywide digital watershed file. It was created primarily for County and federal agency use. The watersheds define Strahler (Strahler 1952 p. 1120) third order stream drainage by contours on U.S. Geological Survey (USGS) 7.5 minute quadrangle map sheets. Some watersheds drainage areas were defined for streams less than third order and some large area watershed were split to maintain a maximum size of 15,000 acres. The watershed boundaries in this file were developed in a joint County and federal effort to create a consistent watershed file for use by all government agencies with an interest in Maryland's watersheds. The U.S. Natural Resources Conservation Service (NRCS) redefined the third order watersheds creating the HUA14 file. This file contains all of the HUA14 watersheds and some added watersheds to maintain water quality sampling sites. It was also used to create the Maryland Sub-Watershed file.
Description: This polygon data represents services related, but not limited to inland water features, wetlands, watersheds, coastal information and shorelines.