High Resolution Ecosystem Map of the Contiguous United States and Adjacent Areas

Caitlin Dempsey

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Regional map of the terrestrial ecosystems of the contiguous United States. Source: NatureServe, 2025.

NatureServe, a nonprofit organization that helps to develop biodiversity data for North America in order to promote conservation efforts, has released a 30-meter resolution terrestrial ecosystem map for the contiguous United States and adjacent areas in Canada and Mexico.

The geospatial database features mid-level ecosystem clarifications for 321 US National Vegetation Classifications (USNVC) and nine other land cover and anthropogenic land use groups. Vegetation is grouped based on shared ecological traits, including climate tolerance, soil requirements, and dominant species.

NatureServe’s U.S. regional ecosystem map builds off of 2022 LANDFIRE Existing Vegetation Types (EVTs) which the nonprofit also developed. The end product is a 30-meter resolution hexagon map developed based on the input from a network of ecologists. These ecologists made suggestions to either keep the ecosystem attribution of each pixel as is, change to a different ecosystem classification, or designate as unknown.

More about the regional ecosystem map of the contiguous United States and adjacent areas

Regional map of the terrestrial ecosystems of the contiguous United States.  Source: NatureServe, 2025.
Regional map of the terrestrial ecosystems of the contiguous United States. Source: NatureServe, 2025.

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Caitlin Dempsey
Caitlin Dempsey is a geographer, writer, and the founder and editor of Geography Realm. She holds bachelor's and master's degrees in Geography from the University of California, Los Angeles (UCLA), as well as a Master of Library and Information Science (MLIS) from San José State University. She has been writing about geography, maps, geographic information systems (GIS), and environmental topics for more than two decades through Geography Realm and its predecessor site, GIS Lounge. Her interests include cartography, remote sensing, environmental geography, and the relationship between people and place.