Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https://
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
The United States Geological Survey (USGS) and National Park Service (NPS) formed the USGS-NPS Vegetation Mapping Program in 1994 to map the vegetation of National Park System units in accordance...
data.gov
An official website of the GSA's Technology Transformation Services