Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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1. 1:100,000 Digital Raster Graphics for Delaware

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

2. 1:100,000 Digital Raster Graphics for Maryland

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

3. 1:100,000 Digital Raster Graphics for Virginia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

4. 1:100,000 Digital Raster Graphics for West Virginia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

5. 1:24,000 - 7.5 minute digital elevation models (DEM) for the District of Columbia (30 meter)

2000. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

6. 1:24,000 - 7.5 minute digital elevation models (DEM) for Virginia (30 meter)

2000. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

7. 1:24,000 - 7.5 minute Digital Raster Graphics for Maryland

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

8. 1:24,000 - 7.5 minute Digital Raster Graphics for New Jersey

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

9. 1:24,000 - 7.5 minute Digital Raster Graphics for the District of Columbia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

10. 1:24,000 - 7.5 minute Digital Raster Graphics for West Virginia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

11. 1:24,000 -7.5 minute digital elevation models (DEM) for West Virginia (30 meter)

2000. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...

12. 1:250,000 Digital Raster Graphics for Delaware

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

13. 1:250,000 Digital Raster Graphics for Maryland

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

14. 1:250,000 Digital Raster Graphics for Virginia

2000. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

15. 1:250,000 Digital Raster Graphics for West Virginia

2000. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

16. Aerial Imagery: Hennepin County, Minnesota, 1940

1940. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of portions of Hennepin County captured during the summer of 1940.

17. Aerial Imagery: Hennepin County, Minnesota, 1953

1953. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of Hennepin County captured during the fall of 1953.

18. Aerial Imagery: Hennepin County, Minnesota, 1957

1957. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of Hennepin County captured during the spring of 1957.

19. Aerial Imagery: Hennepin County, Minnesota, 1964

1964. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of Hennepin County captured during the fall of 1964.

20. Aerial Imagery: Hennepin County, Minnesota, 1969

1969. Hennepin County Geographic Information Systems. Rectified black and white aerial imagery of Hennepin County from 1969.