Description: This layer represents center points of Alaska Native Villages. The Alaska Native Villages are associated with Federally recognized tribal entities.
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: City boundaries are derived from the 2000 U.S. Census Bureau TIGER/Line data. These boundaries include incorporated cities and Census Designated Places.
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. <br/>
<a href='https://edg.epa.gov/metadata/rest/document?id={1F106CB7-C77C-46AF-8F74-EC540592631C}&xsl=metadata_to_html_full' target='_blank'>Metadata</a>
Description: State boundaries are derived from 2000 U.S. Census Bureau TIGER/Line generalized boundaries for state and state equivalent areas. <br/>
<a href='https://edg.epa.gov/metadata/rest/document?id={DCB05F49-28E5-4B70-8E58-1A97FE2A4C82}&xsl=metadata_to_html_full' target='_blank'>Metadata</a>
Description: This layer represents locations of American Indian Tribal lands in the lower 48 states. The areas include all lands associated with Federally recognized tribal entities--Federally recognized Reservations, Off-Reservation Trust Lands, and Census Oklahoma Tribal Statistical Areas.
Description: <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>This data set is a complete digital hydrologic unit boundary layer to Region (2-digit) level for the entire US.</SPAN></P></DIV>
Description: <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>This data set is a complete digital hydrologic unit boundary layer to Subregion (4-digit) level for the entire US.</SPAN></P></DIV>
Description: <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>This data set is a complete digital hydrologic unit boundary layer to Basin(6-digit) level for the entire US.</SPAN></P></DIV>
Description: <DIV STYLE="text-align:Left;font-size:12pt"><DIV><DIV><P><SPAN>This data set is a complete digital hydrologic unit boundary layer to Subbasin (8-digit) level for the entire US.</SPAN></P></DIV></DIV></DIV>
Description: <DIV STYLE="text-align:Left;font-size:12pt"><DIV><DIV><P><SPAN>This data set is a complete digital hydrologic unit boundary layer to the Watershed (10-digit) level for the entire United States. </SPAN></P></DIV></DIV></DIV>
Description: <DIV STYLE="text-align:Left;font-size:12pt"><P><SPAN>This data set is a complete digital hydrologic unit boundary layer to the Subwatershed (12-digit) 6th level for the entire United States.</SPAN></P></DIV>