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1. Global GIS : Alaska Geology

Polygon Harvard University Public content
1980. Geological Survey (U.S.). This datalayer is a polygon coverage with associated attributes representing geologic regions of Alaska. It is a digital version of the geology fe... American Geological Institute.

2. Global GIS : Drainage Basins

Polygon Harvard University Public content
2003. EROS Data Center. This datalayer is a polygon coverage representing hydrologic drainage basins located worldwide. The data displayed here is derived from the HYDRO 1... American Geological Institute.

3. Global GIS : Geologic map (excluding the United States)

Polygon Harvard University Public content
2003. American Geological Institute. This datalayer is a polygon coverage showing U.S. Geological Survey defined geologic provinces of the World, excluding the United States. It was pu... American Geological Institute.

4. Global GIS : geologic provinces of the world

Polygon Harvard University Public content
2000. American Geological Institute. This shapefile includes arcs and polygons that describe U.S. Geological Survey defined geologic provinces of the World. Each province has a set o... American Geological Institute.

6. Global GIS : international river basins of the world

Polygon Harvard University Public content
2003. Wolf, Aaron T. This datalayer is a polygon coverage representing the Transboundary Freshwater Dispute Database dataset: international river basins of the world. T... American Geological Institute.

7. Global GIS : Land ice areas

Polygon Harvard University Public content
1997. United States. National Imagery and Mapping Agency. This datalayer is a polygon coverage representing land ice areas (snow fields or ice fields which are on land) worldwide and was published as part ... American Geological Institute.

9. 106th Congressional District Boundaries

Polygon Harvard University Public content
1999. Bureau of Transportation Statistics, (comp.). The 106th Congressional District Boundaries data set contains geographic information for the political entities of the Congressional districts of t... Bureau of Transportation Statistics.

10. Bureau of Economic Analysis (BEA) Economic Areas

Polygon Harvard University Public content
1998. Bureau of Transportation Statistics. The Bureau of Economic Analysis (BEA)database is a Geographic polygon dataset representing county based economic regions for the United States. Bureau of Transportation Statistics.

11. Federal Aid Urbanized Area Boundaries

Polygon Harvard University Public content
1995. Federal Highways Administration (FHWA). The Federal Aid Urbanized Area Boundaries database is a geographic database of Federal-aid boundaries for urban areas with a population greater tha... Bureau of Transportation Statistics.

12. National Rail Network 1:100,000

Polygon Harvard University Public content
2000. Bureau of Transportation Statistics, comp. The Rail Network is a comprehensive database of the nation's railway system including all railway mainlines, railroad yards, and major sidings in t... Bureau of Transportation Statistics.

13. National Rail Network 1:2,000,000

Polygon Harvard University Public content
2000. Bureau of Transportation Statistics, (comp.). The Rail Network is a comprehensive database of the nation's railway system including all railway mainlines, railroad yards, and major sidings in t... Bureau of Transportation Statistics.

14. National Transportation Analysis Regions

Polygon Harvard University Public content
1995. Bureau of Transportation Statistics, (comp.). National Transportation Analysis Regions (NTAR) divide the U.S. into 89 areas that delineate the functional geography transportation demand. Bureau of Transportation Statistics.

15. U.S. Military Installations

Polygon Harvard University Public content
1998. Bureau of Transportation Statistics, (comp.). The United States Military Installations database contains the boundaries, location, and areal information for important military installations in ... Bureau of Transportation Statistics.

17. CHGIS China County Boundaries, 1911

Polygon Harvard University Public content
1911. CHGIS, Harvard Yenching Insitute. Polygons represent county boundaries in China for the year 1911. The CHGIS will establish a database of historical administrative units, as well as... CHGIS, Harvard Yenching Institute.

18. CHGIS China Lakes and River Banks, 1820

Polygon Harvard University Public content
1820. CHGIS, Harvard Yenching Insitute. Polygon features show the major lakes and wide sections of major rivers in China for the year 1820. Only the major rivers were included in the CHGI... CHGIS, Harvard Yenching Institute.

19. CHGIS China Prefecture Boundaries, 1820

Polygon Harvard University Public content
1820. CHGIS, Harvard Yenching Insitute. Polygons represent prefecture boundaries in China for the year 1820. The CHGIS will establish a database of historical administrative units, as wel... CHGIS, Harvard Yenching Institute.

20. CHGIS CHINA Prefecture Boundaries, 1911

Polygon Harvard University Public content
1911. CHGIS, Harvard Yenching Insitute. Polygons represent prefecture boundaries in China for the year 1911. The CHGIS will establish a database of historical administrative units, as wel... CHGIS, Harvard Yenching Institute.