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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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17.
Vector

Aerial Photography Dates: Iowa, 1950s iowa

1950. Iowa Department of Natural Resources. Zipped file Contains a dateset of the centroids, with dates, of the individual images used.

21.
Raster

Chesapeake Bay Watershed Land Cover Data Series 1984 penn-state

1984. United States Geological Survey (USGS). To better understand how the land is changing and to relate those changes to water quality trends, the USGS funded the production of a Chesapeake B...

22.
Raster

Chesapeake Bay Watershed Land Cover Data Series 1992 penn-state

1992. United States Geological Survey (USGS). To better understand how the land is changing and to relate those changes to water quality trends, the USGS funded the production of a Chesapeake B...

25.
Raster

Digital Orthophoto (DOQQ - quarter-quadrangle) for Delaware 1992 penn-state

1992. United States Geologic Survey (USGS) and Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...

26.
Raster

Digital Orthophoto (DOQQ - quarter-quadrangle) for Delaware 1997 penn-state

1997. United States Geologic Survey (USGS) and Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...

27.
Raster

Digital Orthophoto (DOQQ - quarter-quadrangle) for West Virginia 1997 penn-state

1997. United States Geologic Survey (USGS) and Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...

30.
Raster

Digital Orthophoto Quarter Quadrangle images for Pennsylvania penn-state

1999. United States Geologic Survey (USGS) and Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...

31.
Raster

Digital Orthophoto Quarter Quadrangle images for Pennsylvania penn-state

1993. United States Geologic Survey (USGS) and Pennsylvania Bureau of Topographic and Geologic Survey. Orthophotos combine the image characteristics of a photograph with the geometric qualities of a map. The primary digital orthophotoquad (DOQ) is a ...

45.
Raster

Land Cover Change in Iowa from 1984 - 2003 iowa

1984-2003. Change Detection GRID for the period 1985 to 2002 in the State of Iowa developed from Landsat Imagery. This zip file contains a raster dataset (ESR...

50.

Land Use for Clearwater and Beltrami Counties, 1986: Minnesota minnesota

1986. Department of Geography, Bemidji State University, Clearwater Soil and Water Conservation District (SWCD), and Beltrami Soil and Water Conservation District. An updated raster version of land use was created for Clearwater and Beltrami Counties in 1987, based on 1986 aerial photography. The original Lan...

66.

Orthophotography: Baltimore County, Maryland, 1995 maryland

1995. Baltimore County Web Map Portal. Orthophotography for Baltimore County from March/April 1995. This is not a complete countywide dataset and only includes the eastern portion of Bal...

67.

Orthophotography: Baltimore County, Maryland, 1996 maryland

1996. Baltimore County Web Map Portal. Orthophotography for Baltimore County from March/April 2017. This is not a complete countywide dataset and only includes central and western Baltim...

69.

Orthophotography: Baltimore County, Maryland, 1998 maryland

1998. Baltimore County Web Map Portal. Orthophotography for Baltimore County from March/April 1998. This is not a complete data set and only covers the southern half of Baltimore County.

74.
Vector

PA Explorer: Terrabyte Image: Pennsylvania penn-state

1998. Wayne Myers. The Terrabyte images are extractives from Landsat Thematic Mapper images through the SpectraPlex process. This process does not permit the full res...

75.
Polygon

Streams and Shorelines: Illinois, 2004 illinois

1994. Illinois Department of Natural Resources and Illinois State Geological Survey. This dataset contains data representing streams and shorelines in Illinois and portions of surrounding states as derived from US Geological Survey ...

78.
Raster

Topographic Maps (DRG) for Pennsylvania 1:24,000 - UTM penn-state

1996. United States Geological Survey (USGS). A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map including the collar information, georeferenced t...

83.
Raster

WISCLAND Land Cover, Wisconsin 1998 (Grid) wisconsin

1998. Wisconsin Department of Natural Resources. This Grid-format data set, known as WISCLAND Land Cover, is a raster representation of land cover of Wisconsin derived from Landsat satellite image...

84.
Raster

WISCLAND Land Cover, Wisconsin 1998 (Image) wisconsin

1998. Wisconsin Department of Natural Resources. This tif-format data image of Wisconsin Land Cover illustrates the Level 2 land cover classification encoded in the Wisconsin Land Cover Grid. The ...