The National Hydrography Dataset (NHD) is used to portray surface water. The NHD represents the drainage network with features such as rivers, streams, canals, lakes, ponds, coastline, etc. The principal components of the NHD are: NHDFlowline: This is the fundamental … Continued
Hydrography depicts surface water, including rivers and streams, lakes and ponds, canals, coastlines, and many other water features. The Hydrography layer combines two data sets: the 2021 National Map Hydrographic Geodatabase (1:1,000,000 scale) for small to medium scales, and the … Continued
This layer displays areas that experienced dry or drought conditions in the last seven days. Data are retrieved as shapefiles from the U.S. Drought Monitor and are updated on a weekly basis. The affected areas are represented by polygons, which … Continued
Layer displays the percentage of claims for prescription drugs among Medicare Part D beneficiaries that were for opioid drugs in 2018. Data is available by county, ZIP Code Tabulation Area (ZCTA) and by physician (address).
This layer classifies soils types by farmland importance. Important farmlands consist of prime farmland, unique farmland, and farmland of statewide or local importance. Within these classifications, limitations to farmland importance may be noted. See Prime Farmlands Definitions for further information.
Forest Productivity is a measure of wood volume likely to be produced by the most important tree species based on soil characteristics.
Forest Productivity – Top Species/Tree Types depicts the most productive tree species or type based on soil characteristics.