| タイトル | Evaluation of ERTS-1 data for inventory of forest and rangeland and detection of forest stress |
| 本文（外部サイト） | http://hdl.handle.net/2060/19750009691 |
| 著者（英） | Francis, R. E.; Aldrich, R. C.; Driscoll, R. S.; Heller, R. C.; Weber, F. P. |
| 著者所属（英） | Rocky Mountain Forest and Range Experiment Station|Pacific Southwest Forest and Range Experiment Station |
| 発行日 | 1974-08-09 |
| 言語 | eng |
| 内容記述 | The author has identified the following significant results. Results of photointerpretation indicated that ERTS is a good classifier of forest and nonforest lands (90 to 95 percent accurate). Photointerpreters could make this separation as accurately as signature analysis of the computer compatible tapes. Further breakdowns of cover types at each site could not be accurately classified by interpreters (60 percent) or computer analysts (74 percent). Exceptions were water, wet meadow, and coniferous stands. At no time could the large bark beetle infestations (many over 300 meters in size) be detected on ERTS images. The ERTS wavebands are too broad to distinguish the yellow, yellow-red, and red colors of the dying pine foliage from healthy green-yellow foliage. Forest disturbances could be detected on ERTS color composites about 90 percent of the time when compared with six-year-old photo index mosaics. ERTS enlargements (1:125,000 scale, preferably color prints) would be useful to forest managers of large ownerships over 5,000 hectares (12,500 acres) for broad area planning. Black-and-white enlargements can be used effectively as aerial navigation aids for precision aerial photography where maps are old or not available. |
| NASA分類 | EARTH RESOURCES AND REMOTE SENSING |
| レポートNO | 75N17763
FS-3
NASA-CR-142148
E75-10147 |
| 権利 | No Copyright |
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