Accession Number : ADP001997

Title :   Application of LANDSAT Data to Geologic Mapping Tropical Jungle Environment: Caroni River Basin, Venezuela,


Personal Author(s) : Briceno,H. ; Lee,K.

Report Date : JUN 1982

Pagination or Media Count : 11

Abstract : Vegetation spectral information from LANDSAT and SLAR images, combined with landform analysis have been successfully applied to the detection of diamond-bearing placers in the jungle-covered mid-section of the Caroni River, Venezuela. Six targets were selected for exploration from the photogeologic interpretation; three out of four field-checked targets have proved to be diamondiferous. The remaining are also alluvial areas, but their diamond potentials await for exploration. Photogeologic maps from these images satisfactorily correspond with the regional geologic features in the area. Mapping and statistical analysis of over 9,000 linear features from SLAR and LANDSAT images show that illumination direction affects the data to the point of rendering it almost useless if not corrected for such effects. We have developed mathematical functions to correct for these illumination direction effects in SLAR and LANDSAT linear feature data. (Author)

Descriptors :   *Photography, Vegetation, Venezuela, Rivers, Basins(Geographic), Aerial photography, Scientific satellites, Side looking radar, Rock, Jungles

Distribution Statement : APPROVED FOR PUBLIC RELEASE