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Edson, D. T.

Publications and source records attributed to Edson, D. T..

7 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1973

Investigation of ERTS-A images for application to thematic mapping

The author has identified the following significant results. Theme extractions, enlarged to proper scale can prove a simple and convenient tool for evaluation of small scale map content, and as a guide to and for map revision. Open water extractions provide a graphic, easy to read, historical documentation of the recent Mississippi River flood at successive times during the flood period. Open water extractions, used in conjunction with swamp/wetland extractions, can be used to document and monitor temporal changes in wetland water levels.

Edson, D. T.↗
NASA NTRS1973

Investigation of ERTS-A images for application to thematic mapping

The author has identified the following significant results. Composite mosaics made of open water extractions of the Mississippi River at normal stage and those derived for various flood stages illustrate with startling clarity the recent flood and provide an excellent and timely historical documentation of the temporal changes in flood extent between successive cloud-free ERTS-1 passes.

Edson, D. T.↗
NASA NTRS1972

Automatic thematic mapping in the EROS program

A specified approach to the automatic extraction and catographic presentation of thematic data contained in multispectral photographic images is presented. Experimental efforts were directed toward the mapping of open waters, snow and ice, infrared reflective vegetation, and massed works of man. The system must also be able to process data from a wide variety of sources.

Edson, D. T.↗
NASA NTRS1970

Automatic cartography techniques for earth resources research

Progress in developing instrumentation and software for the EROS user facilities is reported. Significant progress has been made in developing the USGS binary-mode scanning digitizer which is described in detail. Other instrumentation and processes discussed include profile-generating techniques, a manual digitizer, image correlation systems, and some new photomechanical data processing techniques.

Edson, D. T.↗