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.
Suggested Citation
Alexander, R.H., De Forth, P.W., Fitzpatrick, K.A., Lins, H.F., McGinty, H.K., 1975, Interpretation, compilation and field verification procedures in the CARETS project: Final Report Volume 5, iv, 117 p., https://doi.org/10.3133/70039600.
Study Area
| 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 |
| DOI | 10.3133/70039600 |
| Year Published | 1975 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Geography Program |
| Description | iv, 117 p. |
| Country | United States |
| State | Delaware;Maryl;New Jersey;North Carolina;Pennsylvania;Virginia |
| City | Norfold;Portsmouth;Washington D.C. |