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Interpretation, compilation and field verification procedures in the CARETS project

Final Report Volume 5

Sponsored jointly by the National Aeronautics and Space Administration and the U.S. Geological Survey
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Abstract

The production of the CARETS map data base involved the development of a series of procedures for interpreting, compiling, and verifying data obtained from remote sensor sources. Level II land use mapping from high-altitude aircraft photography at a scale of 1:100,000 required production of a photomosaic mapping base for each of the 48, 50 x 50 km sheets, and the interpretation and coding of land use polygons on drafting film overlays. CARETS researchers also produced a series of 1970 to 1972 land use change overlays, using the 1970 land use maps and 1972 high-altitude aircraft photography. To enhance the value of the land use sheets, researchers compiled series of overlays showing cultural features, county boundaries and census tracts, surface geology, and drainage basins. In producing Level I land use maps from Landsat imagery, at a scale of 1:250,000, interpreters overlaid drafting film directly on Landsat color composite transparencies and interpreted on the film. They found that such interpretation involves pattern and spectral signature recognition. In studies using Landsat imagery, interpreters identified numerous areas of change but also identified extensive areas of "false change," where Landsat spectral signatures but not land use had changed.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Unnumbered Series
Title:
Interpretation, compilation and field verification procedures in the CARETS project
Series title:
Final Report
Series number:
Volume 5
Year Published:
1975
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Geography Program
Description:
iv, 117 p.
Number of Pages:
125
Country:
United States
State:
Delaware;Maryl;New Jersey;North Carolina;Pennsylvania;Virginia
City:
Norfold;Portsmouth;Washington D.C.