Accession Number : AD0754579

Title :   The Use of ERTS-1 Imagery in the National Program for the Inspection of Dams.

Descriptive Note : Special rept.,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : McKim,Harlan L. ; Marlar,Thomas L. ; Anderson,Duwayne M.

Report Date : DEC 1972

Pagination or Media Count : 20

Abstract : ERTS-1 imagery can be useful in locating circular water bodies over 152 m (500 ft) in diameter. Dams on streams can be identified by an abrupt change in stream width. A linear termination on a water body is a reliable indication of a dam, particularly when it is inconsistent with the normal drainage pattern. Care must be exercised to avoid confusing cloud shadows with water bodies. However, the association of a cloud with its shadow usually can be accomplished since the sun angle is noted in the data given on each ERTS image. (Author)

Descriptors :   (*SCIENTIFIC SATELLITES, *MULTIBAND SPECTRAL RECONNAISSANCE), (*DAMS, *AERIAL RECONNAISSANCE), PHOTOGRAPHIC IMAGES, PHOTOINTERPRETABILITY, RESOLUTION, PHOTOGRAMMETRY, HYDROGRAPHIC SURVEYING

Subject Categories : Civil Engineering
      Photography
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE