Hydrography – Waterbodies

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 2014 National Map Hydrographic Geodatabase (1:1,000,000 scale) for small to medium scales, and the 2016 National Hydrography Datataset (NHD) (1:24,000 scale) for large scale mapping. Hydrography is depicted in…

National Hydrography Dataset (Area)

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 flow network consisting predominantly of stream/river and artificial path vector features. It represents the spatial…

Access to Farmer’s Markets

This layer displays the percentage of each county’s population (or low income population) living near a farmer’s market (defined as within a 3 mile radius in urban areas and a 10 mile radius in urban areas). Data have been updated to reflect farmers markets from the May 2016 version of the USDA Local Food Directories…