This 12-inch resolution aerial imagery for the area in and around Prince William Forest Park (PRWI) in Triangle, Virginia was collected on March 8, 2021 as part of the Virginia Base Mapping Program (VBMP) managed by the Virginia Geographic Information Network Division (VGIN) of the Virginia Information Technologies Agency (VITA). The individual raster tiles provided by VGIN were combined into a single raster file and projected into coordinate systems commonly-used by the NPS. The areas adjacent to the park under the jurisdiction of the U.S. Marine Corps have been removed for the security reasons.

This color infrared imagery covers the area in and around the Prince William Forest Park (PRWI). The photographs were taken in 2004 and published in 2006. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The color infrared (CIR) National Park Service area mosaic meet or exceed NMAS for 90% of well defined points will fall within one (1) meter of true position. The extent of the National Park Area mosaic is 582.261 sq km of measure inclusive of a 804 meter buffer (There are seven images making up this mosaic). The overedge is included to facilitate tonal matching in order to identify selected species identification. The image resolution is 1 foot. The scale is 1:6000.

This color infrared imagery covers the area in and around the Prince William Forest Park (PRWI). The photographs were taken in 2004 and published in 2006. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The color infrared (CIR) National Park Service area mosaic meet or exceed NMAS for 90% of well defined points will fall within one (1) meter of true position. The extent of the National Park Area mosaic is 582.261 sq km of measure inclusive of a 804 meter buffer (There are seven images making up this mosaic). The overedge is included to facilitate tonal matching in order to identify selected species identification. The image resolution is 1 foot. The scale is 1:6000.

The U.S. Geological Survey collected multispectral and visible light imagery via a quadcopter, small unoccupied aircraft system (sUAS) deployed near Ashville Bridge Creek in Virginia Beach, VA. Approximately 0.25 sq mi surrounding US Fish and Wildlife Service (USFWS) Back Bay National Wildlife Refuge along Ashville Bridge Creek approximately 0.5 mi south of Lotus Garden Park on July 17 and 18, 2018. Photos were collected at a height of 400 ft above ground level (AGL) with approximately 70% frontlap between photos and approximately 30% sidelap between survey lines. Multispectral images were collected in a tif format using a Micasense RedEdge M with a Ground Sample Distance of 8.2 cm/pixel, visible light images were collected in a jpg format using a Ricoh GR II with a ground sample distance of 3.2 cm/pixel. The multispectral images were geotagged when collected.

The U.S. Geological Survey collected multispectral and visible light imagery via a quadcopter, small unoccupied aircraft system (sUAS) deployed near Ashville Bridge Creek in Virginia Beach, VA. Approximately 0.25 sq mi surrounding US Fish and Wildlife Service (USFWS) Back Bay National Wildlife Refuge along Ashville Bridge Creek approximately 0.5 mi south of Lotus Garden Park on July 17 and 18, 2018. Photos were collected at a height of 400 ft above ground level (AGL) with approximately 70% frontlap between photos and approximately 30% sidelap between survey lines. Multispectral images were collected in a tif format using a Micasense RedEdge M with a Ground Sample Distance of 8.2 cm/pixel, visible light images were collected in a jpg format using a Ricoh GR II with a ground sample distance of 3.2 cm/pixel. The multispectral images were geotagged when collected.

This color infrared imagery covers the area in and around the George Washington Memorial Parkway (GWMP). The photographs were taken in 2004 and published in 2006. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The color infrared (CIR) National Park Service area mosaic meet or exceed NMAS for 90% of well defined points will fall within one (1) meter of true position. The extent of the National Park Area mosaic is 582.261 sq km of measure inclusive of a 804 meter buffer (There are seven images making up this mosaic). The overedge is included to facilitate tonal matching in order to identify selected species identification. The image resolution is 1 foot. The scale is 1:6000.

This color infrared imagery covers the area in and around the George Washington Memorial Parkway (GWMP). The photographs were taken in 2004 and published in 2006. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The color infrared (CIR) National Park Service area mosaic meet or exceed NMAS for 90% of well defined points will fall within one (1) meter of true position. The extent of the National Park Area mosaic is 582.261 sq km of measure inclusive of a 804 meter buffer (There are seven images making up this mosaic). The overedge is included to facilitate tonal matching in order to identify selected species identification. The image resolution is 1 foot. The scale is 1:6000.

This color infrared imagery covers the area in and around the Harpers Ferry National Historical Park (HAFE). The photographs were taken in 2004 and published in 2006. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The color infrared (CIR) National Park Service area mosaic meet or exceed NMAS for 90% of well defined points will fall within one (1) meter of true position. The extent of the National Park Area mosaic is 582.261 sq km of measure inclusive of a 804 meter buffer (There are seven images making up this mosaic). The overedge is included to facilitate tonal matching in order to identify selected species identification. The image resolution is 1 foot. The scale is 1:6000.

This color infrared imagery covers the area in and around the Harpers Ferry National Historical Park (HAFE). The photographs were taken in 2004 and published in 2006. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The color infrared (CIR) National Park Service area mosaic meet or exceed NMAS for 90% of well defined points will fall within one (1) meter of true position. The extent of the National Park Area mosaic is 582.261 sq km of measure inclusive of a 804 meter buffer (There are seven images making up this mosaic). The overedge is included to facilitate tonal matching in order to identify selected species identification. The image resolution is 1 foot. The scale is 1:6000.

LiDAR derived Canopy Height at PRWI at 1m resolution. These data are part of a large data set describing the three-dimensional structure of vegetation in portions of four, primarily forested national parks: Prince William Forest Park, Catoctin Mountain Park, C&O Canal National Historical Park, and Harpers Ferry National Historical Park. All four parks are within the National Capital Region Inventory and Monitoring Network and contain forest monitoring plots that have been measured yearly since 2005. We acquired Light Detection and Ranging (LiDAR) surveys of these parks during leaf-on conditions in 2009 and 2010. From these data four primary products were generated: (1) digital elevation models (2-m resolution DEMs), (2) Canopy height models (at 1- and 2-m resolutions), (3) canopy gaps (defined as 2-m grid cells with canopies shorter than 3m), and (4) understory percent cover (2-m resolution). All data products are made available in standard GIS-compatible file formats and are intended to be used to understand spatial patterns in vegetation structure and as documentation of baseline conditions. Future assessments of vegetation structure using the same or similar methods would enable assessment of change in vegetation structure over time.