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You searched for: Subject Imagery and Base Maps Remove constraint Subject: Imagery and Base Maps Type Dataset Remove constraint Type: Dataset Time Period 1950-1999 Remove constraint Time Period: 1950-1999
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13.
Vector Created with Sketch.

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.

14.
Vector Created with Sketch.

Aerial Photography Dates: Iowa, 1960s iowa

1960. Iowa Department of Natural Resources. This dataset is centroids with dates of the individual images used.

15.
Vector Created with Sketch.

Aerial Photography Dates: Iowa, 1970s iowa

1970. Iowa Department of Natural Resources. This shapefile has centroids with dates of all images used in this dataset.

17.
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...

18.
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...