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USGS Biological Resources Division, Center for Biological Informatics

The National Park Service (NPS), in conjunction with the Biological Resources Division (BRD) of the U.S. Geological Survey (USGS), has implemented a program to "develop a uniform hierarchical vegetation methodology" at a national level. The program will also create a geographic information system (GIS) database for the parks under its management. The purpose of the data is to document the state of vegetation within the NPS service area during the 1990's, thereby providing a baseline study for further analysis at the Regional or Service-wide level. The vegetation units of this map were determined through stereoscopic interpretation of aerial photographs supported by field sampling and ecological analysis. The vegetation...
The geographic information system (GIS) format spatial data set of vegetation for Saint Croix National Scenic Riverway (SACN) was created for the National Park Service (NPS) Vegetation Inventory Program (VIP). The SACN administrative boundary covers an area of nearly 39,500 ha. The project boundary for the SACN vegetation mapping project covers an areas of just over 68,200 ha with the approximate 300 m buffer. The map classification scheme used to create the vegetation data set is designed to represent local vegetation types at the finest level possible using the National Vegetation Classification Standard (NVCS) Version 2. Physiognomic information was also recorded, including height (woody vegetation), canopy density,...
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