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Tamarisk Remote Sensing Inventory and Assessment

Denise Y. M. Laes

出版	U.S. Department of Agriculture, Forest Service, Remote Sensing Appllications Center, 2006
URL	http://books.google.com.hk/books?id=UUXYuQEACAAJ&hl=&source=gbs_api

註釋

Tamarisk was introduced to the Western United States during the late 1800s and has drastically changed plant and wildlife communities along the Colorado River Basin (figure 1). Early detection and removal of tamarisk have become goals of land managers. A project sponsored by the Remote Sensing Steering Committee (RSSC) assessed how effectively remotely sensed imagery can detect tamarisk. Imagery analyzed in this study varied in both spatial and spectral characteristics. An aerial survey crew collected natural color and color-infrared digital-camera imagery in early and late summer of 2002 near Grand Junction, CO. A field crew collected hyperspectral data during midsummer of the same year. Analysts tested both automated and semiautomated image interpretation techniques on the data. The analysts mapped the hyperspectral images using a mixture-tuned matched-filtering partial-unmixing technique. The results showed that both data sources can efficiently map larger stands of tamarisk but may not work as well for early detection.