Television Display of Topographic Maps

by Kam W. Wong, (A.M.ASCE), Assistant Professor; Civil Engineering, University of Illinois, Urbana, IL,
Nick G. Yacoumelos, Research Assistant; Dept. of Civil Engineering, University of Illinois, Urbana, IL,

Serial Information: Journal of the Surveying and Mapping Division, 1971, Vol. 97, Issue 2, Pg. 273-285

Document Type: Journal Paper


Television is ideally suited as a cockpit display device in air navigation and as a real time communication link in a topographic data bank. Resolution and geometric fidelity are the two critical factors that must be considered in the design of a TV system for displaying topographic information. Experimental studies showed that a display scale of 8 TV-lines per mm on the map sample would be needed to distinguish the fine details in the TV display. Although the geometric distortions in a conventional TV system may amount to 7.4 TV-lines at one sigma level, an accurate distortion map of the display can be obtained by a photogrammetric calibration procedure.

Subject Headings: Topography | Mapping | Geometrics | Distortion (structural) | Navigation (geomatic) | Photogrammetry | Calibration | Communication systems

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