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These files were used to construct corridors estimating the extent of new coastal corridors exposed by reduced lake levels. They are included here to show the available horizontal extent of lidar-derived topo-bathymetric data and thus explicitly identify gaps and limitations of predicted corridor extents under various reduced lake level scenarios. In addition, these files provide users with a background layer that depicts the topographic variability of the submerged near-shore lake bed and terrestrial landscape.These files are 5m grid representations of the hydrographic and topographic data collected by the CHARTS system along the coasts of the U.S. sides of Lake Michigan, Lake Huron, Lake St. Clair, Lake Erie,...
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This collection of maps shows relative habitat quality for a suite of species that use riparian overstory habitats. Component layers include: tree patch size, presence and complexity of riparian understory, and abundance of tamarisk. Associated layers such as river channels at high flow and bottomland reaches are included for reference.
Released hydrology research data sets
Categories: Data, Image, Map
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Current national data resources for GAP include three primary data sets – land cover, protected areas, and species. Land Cover: The GAP/LANDFIRE National Terrestrial Ecosystems data, based on the NatureServe Ecological Systems Classification, are the foundation of the most detailed, consistent map of vegetation available for the United States. These data facilitate the planning and management for biological diversity on a regional and national scale. Learn more about GAP land cover data here: https://www.usgs.gov/core-science-systems/science-analytics-and-synthesis/gap/science/land-cover Protected Areas: The Protected Areas Database of the United States (PAD-US) is a national geodatabase, created by USGS GAP,...
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This data layer summarizes ecological systems and land cover classes described in state-level and national-level maps as Broadly Defined Habitats for groups of species of conservation concern. Each grid cell in the raster is assigned a Condition Index value based on desired condition metrics using ancillary datasets and a decision tree approach for each assessed habitat. Grid cells are also assigned bar code descriptors indicating which metrics contributed to the Condition Index score for that cell. This layer also contains information about potential habitats based on the LANDFIRE Biophysical Settings data layer. This layer was developed to support the next iteration of the Conservation Blueprint developed by the...
This dataset presents measures of landscape fragmentation calculated by FRAGSTATS at 4KM and HUC5 reporting unit levels. Fragmentation integrates the influence of urban, agriculture, invasive vegetation, roads, pipelines, utility lines, oil/gas wells, and water on patches of natural vegetation.
This map shows the current and historic distribution of this ecosystem, in the context of change agents and disturbance types, as well as current and near-term status and long term potential for change. This map includes current distribution from LANDFIRE EVT and NatureServe Landcover, and historic distribution from LANDFIRE BpS.
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This map shows the potential current distribution of yellow-breasted chat, in the context of current and near-term terrestrial intactness and long-term potential for climate change and energy development.
This map shows the location of EPA Level IV Ecoregions in the Colorado Plateau Ecoregion.
This map shows the current distribution of this ecosystem (from NatureServe Landcover), in the context of current and near-term status and long term potential for change.
This map shows the location of sensitive soils, which were extracted from SSURGO and STATSGO soil datasets.
Portal which contains modeled projections of storm surge from coastal storms along the East and Gulf Coasts and the resulting physical,economic, and social losses. Developed in collabortion with FEMA. Contains SLOSH storm surge data and HAZUS loss data by census block.
Categories: Data, Map, Web Site; Types: Application, Downloadable
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High-latitude regions are experiencing rapid and extensive changes in ecosystem composition and function as the result of increases in average air temperature. Increasing air temperatures have led to widespread thawing and degradation of permafrost, which in turn has affected ecosystems, socioeconomics, and the carbon cycle of high latitudes. Research shows that the distribution of permafrost is heterogeneous in nature and that permafrost responds to a wide range of ecological factors. Here we overcome complex interactions between surface and subsurface conditions to map near-surface permafrost using decision-tree models, field observations, remotely sensed and derived data, and climatic indices. The resultant dataset...


map background search result map search result map Cascadia North M8.3 Saddle Mt, WA M7.3 Elsinore Fault, Chino Section CA M6.7 Elsinore Fault, Temecula Section CA M6.8 New Madrid-central section M7.7 Hayward Fault CA M7.0 SE rupture V2 National Level Exercise 2011 Wabash Valley Seismic Zone M6.0 Current National Data Resources for the Gap Analysis Project Riparian Overstory Model and Component Layers Lidar Topo-Bathymetry Colorado Plateau REA Conservation Elements - Terrestrial Ecosystems: Colorado Plateau Mixed Bedrock Canyon and Tableland Colorado Plateau  REA Conservation Elements - Terrestrial Ecosystems: Rocky Mountain Gambel Oak-Mixed Montane Shrubland Colorado Plateau REA Conservation Elements - Terrestrial Species: Yellow-Breasted Chat Colorado Plateau REA EPA Level IV Ecoregions Colorado Plateau REA Indicators: Natural Vegetation Fragmentation Colorado Plateau REA MQ A2: Where are sensitive soils (including saline, sodic, gypsiferous, shallow, low water holding capacity)? Probabilistic estimates of the distribution of near-surface permafrost in Alaska Arkansas Broadly Defined Habitats Riparian Overstory Model and Component Layers Arkansas Broadly Defined Habitats Colorado Plateau REA Conservation Elements - Terrestrial Ecosystems: Colorado Plateau Mixed Bedrock Canyon and Tableland Colorado Plateau REA Conservation Elements - Terrestrial Species: Yellow-Breasted Chat Colorado Plateau REA EPA Level IV Ecoregions Colorado Plateau REA Indicators: Natural Vegetation Fragmentation Lidar Topo-Bathymetry Colorado Plateau  REA Conservation Elements - Terrestrial Ecosystems: Rocky Mountain Gambel Oak-Mixed Montane Shrubland Colorado Plateau REA MQ A2: Where are sensitive soils (including saline, sodic, gypsiferous, shallow, low water holding capacity)? Probabilistic estimates of the distribution of near-surface permafrost in Alaska Current National Data Resources for the Gap Analysis Project