eRAMS Public Layers

Public layers are sourced from publicly available national datasets and can be explored using the “Public Layers”  tab located on the left dashboard.  Each item listed is a collection of layers that can be selected or deselected through clicking the adjacent checkbox.

Public layers can be further explored by clicking on each item under the collection to display display additional information as well as options to select attributes to visualize, adjust layer transparency, zoom to layer extent, and metadata about the map service providing the information.

Data can also be extracted from public layers for further spatial analysis. Extracted data are stored as an item under the Geospatial Layers map tab, or if you are working in a project, as an item under the User or Project Layers map tab.

Publicly Available Data

U.S. Census

Data are available from the U.S. Census Bureau for several years at the State, County, Tract, Block Group, and Block levels. Display of each layer is dependent zoom to that level. Attributes include population, population density and household information.

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U.S. Geo Data

The U.S. Geo Data collection of layers includes transportation, geographical, and political map information derived from The National Map published by the United States Geological Survey and other federal, state, and local agencies to improve access to base geographic data.

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U.S. Hydro Data

Hydrography and watershed boundary information are available for displaying point, line, and polygon features related to national drainage networks and related features, including rivers, streams, canals, lakes, ponds, glaciers, coastlines, dams, and streamgages.

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U.S. EPA Water Data

Water data from the U.S. Environmental Protection Agency are available from several different databases including information about water quality, permitting, surface and groundwater, and beach pollution monitoring.

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Land Use Land Cover

Land use and land cover data are available from two sources, the United States National Agricultural Statistics Service (NASS), and the United States Geological Survey National Land Cover Database (NLCD) from The National Map. Information from these sources is primarily derived from classification of satellite imagery.

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