| 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. |
| Genre: | USGS Unnumbered Series |
| ProdID: | 70039600 |
| Citation Author: | Alexander, Robert H.; De Forth, Peter W.; Fitzpatrick, Katherine A.; Lins, Harry F., Jr.; McGinty, Herbert K., III |
| Citation Contributing Office: | Geography Program |
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| Citation Language: | English |
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| Citation LatN: | 0404000 |
| Citation LatS: | 0360000 |
| Citation LonE: | -0740000 |
| Citation LonW: | -0780000 |
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| Citation Number Of Pages: | 125 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | iv, 117 p. |
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| Citation Public Comments: | Sponsored jointly by the National Aeronautics and Space Administration and the U.S. Geological Survey |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Final Report |
| Citation Series Code: | |
| Citation Series Number: | Volume 5 |
| Citation Search Results Text: | Interpretation, compilation and field verification procedures in the CARETS project; 1975; USGS Unnumbered Series; Volume 5; Alexander, Robert H.; De Forth, Peter W.; Fitzpatrick, Katherine A.; Lins, Harry F., Jr.; McGinty, Herbert K., III |
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| Citation Year: | 1975 |
| Type: | citation/reference |
| Text: | Interpretation, compilation and field verification procedures in the CARETS project; 1975; USGS Unnumbered Series; Volume 5; Alexander, Robert H.; De Forth, Peter W.; Fitzpatrick, Katherine A.; Lins, Harry F., Jr.; McGinty, Herbert K., III |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| Date Other: | Sun, 1 Jan 2012 13:33 -0600 |
| Publisher: | U.S. Geological Survey |
