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 2016 National Hydrography Datataset (NHD) (1:24,000 scale) for large scale mapping. Hydrography is depicted in…
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…
This layer displays the number and rate of fatalities from motor vehicle crashes occurring between 2015 and 2019, aggregated by county. Unlike typical mortality data, this data layer represents the location of the fatal crash, and not the county of the decedent’s residence.
This layer displays the number and percentage of fatal vehicle crashes involving alcohol occurring between 2015 and 2019. Data are aggregated by county of occurrence.
This dataset contains point features representing building locations of fire stations in the United States, District of Columbia, Puerto Rico and the U.S. Virgin Islands. The purpose of this collection is to represent the fire station locations on general purpose cartographic products. The data includes manned fire stations and buildings from which a fire response…
The local law enforcement locations feature class/ shapefile contains point location and tabular information pertaining to a wide range of law enforcement entities in the United States. Law Enforcement agencies “are publicly funded and employ at least one full-time or part-time sworn officer with general arrest powers”. This is the definition used by the US…