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The Land Cover Data - Version 1.0 represents a highly thematically detailed land cover map of the U.S. The map legend includes types described by NatureServe's Ecological Systems Classification (Comer et al. 2002) as well as land use classes described in the National Land Cover Dataset 2001 (Homer et al. 2007). This version of the land cover data was used to support the Gap Analysis Project's vertebrate species modeling efforts. These data cover the entire continental U.S. and are a continuous data layer. These raster data have a 30 m x 30 m cell resolution. This land cover data set is considered official foundational data for the GAP species modeling process. The data have been made available provisionally to enhance...
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This part of the data release presents projected flooding extent polygon (flood masks) and flooding depth points (flood points) shapefiles based on wave-driven total water levels for the Territory of the U.S. Virgin Islands (the islands of Saint Croix, Saint John, and Saint Thomas). For each island there are 8 associated flood mask and flood depth shapefiles: one for each four nearshore wave energy return periods (rp; 10-, 50-, 100-, and 500-years) and both with (wrf) and without (worf) the presence of coral reefs. Flooding depth point data are also presented as a comma-separated value (.csv) text file.
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This part of the data release presents projected flooding extent polygon (flood masks) and flooding depth points (flood points) shapefiles based on wave-driven total water levels for Commonwealth of the Northern Mariana Islands (the islands of Saipan and Tinian). For each island there are 8 associated flood mask and flood depth shapefiles: one for each of four nearshore wave energy return periods (rp; 10-, 50-, 100-, and 500-years) and both with (wrf) and without (worf) the presence of coral reefs.
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The dataset provides a spatially explicit estimate of 2019 herbaceous annual percent cover predicted on May 1st with an emphasis on annual grasses. The estimate is based on the mean output of two regression-tree models. For one model, we include, as an independent variable amongst other independent variables, a dataset that is the mean of 17-years of annual herbaceous percent cover (https://doi.org/10.5066/F71J98QK). This model's test mean error rate (n = 1670), based on nine different randomizations, equals 4.9% with a standard deviation of +/- 0.15. A second model was developed that did not include the mean of 17-years of annual herbaceous percent cover, and this model's test mean error rate (n = 1670), based...


map background search result map search result map USGS Gap Analysis Project - Additional Data – National Gap Land Cover Ver 1.0 (2001) USGS Land Cover - Woodland for Alabama 20180802 State or Territory FileGDB 10.1 USGS National Landcover - Woodland in Georgia 20200901 State or Territory Shapefile USGS Land Cover - Woodland for Iowa 20181113 State or Territory Shapefile USGS National Landcover - Woodland in Kentucky 20190619 State or Territory Shapefile USGS Land Cover - Woodland for Michigan 20180810 State or Territory Shapefile USGS National Landcover - Woodland in New Jersey 20191015 State or Territory FileGDB 10.1 USGS Land Cover - Woodland for New Mexico 20180810 State or Territory FileGDB 10.1 USGS National Landcover - Woodland in North Dakota 20200716 State or Territory FileGDB 10.1 USGS National Landcover - Woodland in Oregon 20200318 State or Territory Shapefile USGS National Landcover - Woodland in Pennsylvania 20190829 State or Territory Shapefile USGS Land Cover - Woodland for Rhode Island 20180810 State or Territory FileGDB 10.1 USGS Land Cover - Woodland for Utah 20180810 State or Territory FileGDB 10.1 USGS Land Cover - Woodland for Vermont 20180810 State or Territory Shapefile USGS Land Cover - Woodland for California 20181111 State or Territory Shapefile Projected flood extent polygons and flood depth points based on 10-, 50-, 100-, and 500-year wave-energy return periods, with and without coral reefs, for the Commonwealth of the Northern Mariana Islands (the islands of Saipan and Tinian) Projected flood extent polygons and flood depth points based on 10-, 50-, 100-, and 500-year wave-energy return periods, with and without coral reefs, for the Territory of the U.S. Virgin Islands (the islands of Saint Croix, Saint John, and Saint Thomas) Early Estimates of Herbaceous Annual Cover in the Sagebrush Ecosystem (May 1, 2019) USGS National Landcover - Woodland in Alaska 20200903 State or Territory FileGDB 10.1 USGS National Landcover - Woodland in FileGDB 10.1 format (published 20201028) Projected flood extent polygons and flood depth points based on 10-, 50-, 100-, and 500-year wave-energy return periods, with and without coral reefs, for the Commonwealth of the Northern Mariana Islands (the islands of Saipan and Tinian) USGS Land Cover - Woodland for Rhode Island 20180810 State or Territory FileGDB 10.1 USGS National Landcover - Woodland in New Jersey 20191015 State or Territory FileGDB 10.1 USGS Land Cover - Woodland for Vermont 20180810 State or Territory Shapefile USGS National Landcover - Woodland in Pennsylvania 20190829 State or Territory Shapefile USGS Land Cover - Woodland for Alabama 20180802 State or Territory FileGDB 10.1 USGS National Landcover - Woodland in Kentucky 20190619 State or Territory Shapefile USGS Land Cover - Woodland for Iowa 20181113 State or Territory Shapefile USGS National Landcover - Woodland in Georgia 20200901 State or Territory Shapefile USGS National Landcover - Woodland in North Dakota 20200716 State or Territory FileGDB 10.1 USGS Land Cover - Woodland for Utah 20180810 State or Territory FileGDB 10.1 USGS Land Cover - Woodland for New Mexico 20180810 State or Territory FileGDB 10.1 USGS National Landcover - Woodland in Oregon 20200318 State or Territory Shapefile USGS Land Cover - Woodland for Michigan 20180810 State or Territory Shapefile USGS Land Cover - Woodland for California 20181111 State or Territory Shapefile Early Estimates of Herbaceous Annual Cover in the Sagebrush Ecosystem (May 1, 2019) USGS Gap Analysis Project - Additional Data – National Gap Land Cover Ver 1.0 (2001) USGS National Landcover - Woodland in FileGDB 10.1 format (published 20201028) USGS National Landcover - Woodland in Alaska 20200903 State or Territory FileGDB 10.1