Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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You searched for: Subject Imagery and Base Maps Remove constraint Subject: Imagery and Base Maps Time Period 1950-1999 Remove constraint Time Period: 1950-1999
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1. 1:100,000 Digital Raster Graphics for Delaware: Delaware, 2000

1996. 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

1995. 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: Virginia, 2000

1996. 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: West Virginia, 2000

1996. 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. 1:100,000 Digital Raster Graphics: Maryland, 2000

1995. 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...

6. 1:24,000 - 7.5 minute Digital Raster Graphics for Maryland: Maryland, 2000

1996. 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...

7. 1:24,000 - 7.5 minute Digital Raster Graphics for the District of Columbia: District: District of Columbia, 2000

1996. 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 West Virginia: West Virginia, 2000

1996. 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: New Jersey, 2000

1995. 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. 1:250,000 Digital Raster Graphics for Delaware: Delaware, 2000

1996. 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. 1:250,000 Digital Raster Graphics for Maryland

1995. 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...

12. 1:250,000 Digital Raster Graphics for Maryland: Maryland, 2000

1996. 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 Virginia: Virginia, 2000

1996. 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 West Virginia: West Virginia, 2000

1995. 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...

15. 1:250k Digital Raster Graphic - Collars Removed: Minnesota

1998. U.S. Geological Survey and Minnesota DNR. A digital raster graphic (DRG) is a scanned image of an U.S. Geological Survey (USGS) standard series topographic map, including all map collar inf...

16. 7.5 minute digital elevation models (DEM) for the District of Columbia (30 meter): Washington DC, 2000

1979. 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...

17. 7.5 minute digital elevation models (DEM) for Virginia (30 meter): Virginia, 2000

1979. 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...

18. 7.5 minute digital elevation models (DEM) for West Virginia (30 meter): West Virginia, 2000

1979. 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...

19. 7.5 minute Digital Raster Graphics for Pennsylvania - UTM - cropped collars: Pennsylvania, 1996

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars, georeferenced to the UTM grid.

20. 7.5 minute Digital Raster Graphics for Pennsylvania - UTM grid - NAD 1983 - cropped collars: Pennsylvania, 1996

1996. U.S. Geological Survey. A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars, georeferenced to the UTM gr...