Description: Zip Codes are numbers that identify each postal delivery area in the United States. The Zip Code boundaries layer is provided by Tele Atlas, 2008.
Description: A congressional district is an electoral constituency that elects a single member of a congress. A congressional district is based on population, which in the United States is determined by taking a census every ten years.
Description: City boundaries are derived from the 2014 U.S. Census Bureau TIGER/Line data. These boundaries include incorporated cities and Census Designated Places.
Description: Urban Areas are downloaded from the 2023 U.S. Census Bureau TIGER/Line Urban Areas. Census defines an urban area as comprised of a densely settled core of census blocks that meet minimum housing unit density and/or population density requirements. This includes adjacent territory containing non-residential urban land uses. To qualify as an urban area, the territory identified according to criteria must encompass at least 2,000 housing units or have a population of at least 5,000.
Description: This EPA content item depicts U.S. federal lands, or public lands, as developed by Esri in partnership with six federal agencies, bureaus, and/or departments, including Bureau of Land Management, Bureau of Reclamation, Department of Defense, National Park Service, US Fish and Wildlife Service and US Forest Service. Data downloaded from EPA SEGS US Federal Lands map service.
Description: This data set portrays the Public Land Surveys of the United States, including areas of private survey, Donation Land Claims, and Land Grants and Civil Colonies. It is intended for geographic display and analysis at the national level, and for large regional areas. The data should be displayed and analyzed at scales appropriate for 1:2,000,000-scale data.
Description: The Counties layer portrays the county boundaries of the United States. A county is the largest territorial division for local government within a state in the United States. This map layer is downloaded from the U.S. Census Bureau. Metadata
Description: State boundaries are derived from 2000 U.S. Census Bureau TIGER/Line generalized boundaries for state and state equivalent areas. Metadata