. The California desert, majestic, challenging, and very vulnerable. Deserts. /\dditionally, remotely sensed data obtained from NASA's LandSat satellites is being used in preparing inventories of minerals, geology, soil types, vegetation, and wildlife habitat. When pieced together, approximately 10 LandSat images provide a continuous overview of the entire CDCA. LandSat satellites are about 750 miles from the earth's surface, providing an unbroken panoramic view of the entire California Desert Conservation Area. By comparing the larger-scale U-2 photos with the smaller-scale satellite images,
. The California desert, majestic, challenging, and very vulnerable. Deserts. /\dditionally, remotely sensed data obtained from NASA's LandSat satellites is being used in preparing inventories of minerals, geology, soil types, vegetation, and wildlife habitat. When pieced together, approximately 10 LandSat images provide a continuous overview of the entire CDCA. LandSat satellites are about 750 miles from the earth's surface, providing an unbroken panoramic view of the entire California Desert Conservation Area. By comparing the larger-scale U-2 photos with the smaller-scale satellite images, objects only partially discernible in the imagery are readily detected and interpreted. On-the-spot ground checks, performed by field crews, further examine what certain objects appearing on the satellite images and larger-scale photos actually are. This practice permits interpretation of similar images in other areas not ground checked. Where discrepancies are noted between remotely sensed information and previously recorded data, this same "ground-truthing" technique is used to update and correct existing maps and other records. "Mapping" certain resources in the CDCA by superimposing remotely sensed data on existing information is accomplished in two phases. The first results in a small-scale representation of tho overall area under study. In the case of mineral resources, for example, this method necessarily produces relatively generalized data showing comparatively little detail. The primary purpose of the first phase is to select "probable" areas, or those of unusual interest, to which field crews (in the second phase) may be sent for intensive ground examination. Ground checks isolate pockets of "high-confidence" level data. A substantial amount of this "high-confidence" information may be extrapolated, or projected, over the entire study area for final research and Please note that these images are extracted f
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Keywords: ., boo, bookcentury1900, bookcollectionamericana, booksubjectdeserts
