LiDAR Digital Elevation Models, Prince William Forest Park
Federal Emergency Management Agency. 2011. LiDAR Digital Elevation Models, Prince William Forest Park. National Capital Region, National Park Service. Prince William Forest Park in Triangle, Virginia
This 1-meter resolution digital elevation model (DEM) covers the area in and around Prince William Forest Park, Virginia. The original data was derived from LiDAR point cloud data collected in 2011 as part of a larger project involving multiple counties in Virginia. The primary content of this metadata is taken directly from that project metadata. National Capital Regional GIS staff took the original DEM rasters and created a mosaic to cover Prince William Forest Park. The data was then clipped to exclude the Quantico Marine Corps Base. The raster was projected into Virginia State Plane, North (Feet), North American Datum 1983. Dewberry collected LiDAR for ~3,341 square miles in various Virginia Counties, a part of Worcester County, and Hooper's Island. The acquisition was performed by Terrapoint. This metadata covers the LiDAR produced for the Virginia Counties North project area. The nominal pulse spacing for this project is 1.6 ft (0.5 meters). This project was collected with a sensor which collects intensity values for each discrete pulse extracted from the waveform. GPS Week Time, Intensity, Flightline and echo number attributes were provided for each LiDAR point. Dewberry used proprietary procedures to classify the LAS according to contract specifications: 1-Unclassified, 2-Ground, 7-Noise, 9-Water, 10-Ignored Ground due to breakline proximity, and 11-Withheld. Dewberry produced 3D breaklines and combined these with the final LiDAR data to produce seamless hydro flattened DEMs for the 2,140 tiles (5000 ft x 5000 ft) that cover the project area.
- Type
- Geospatial Dataset
- Authors
- Federal Emergency Management Agency
- Date of Issue
- 2011-07-01
- Publisher
- National Capital Region, National Park Service
- Units
- PRWI
- Keywords
- Breaklines, DEM, DTM, Elevation, Hydro Flattened, LAS, Lidar, National Capital Region, National Park Service, NCR, NPS, Prince William, Prince William Forest Park, PRWI, Stafford, VA, Virginia