Process for making shade relief maps and the map made thereby

Details Process for making shade relief maps and the map made thereby Process for making shade relief maps and the map made thereby

1976-12-27

1979-04-10

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

Distortion introducing or rectifying

35 41, 355 77, G03B 2768, G03B 2732, G09B 2912

Patent

active

041485807

ABSTRACT:
A method for making shade relief maps with the value of the shade thereon proportional to the degree of actual ground slope, to provide, thereby, the simulation of a third dimension to two dimensional map productions. A discrete weight and configuration study of the slope in an area to be shown in shade relief is converted by mechanical means to an image production in known scale of surface undulations having shade density values proportional to the degree of slope. The shade image production is superimposed in scale registry upon an image containing features other than slope thereby providing, through the combined image, a shade relief map production having slope related shade thereon. The product of the aforesaid method comprises a map having manufactured shade provided thereon wherein the value of such shade is proportional to the degree of ground slope.

REFERENCES:
patent: 2430277 (1947-11-01), Cooke
patent: 2503126 (1950-04-01), Muldrow et al.
patent: 3280696 (1966-10-01), Ketchian
patent: 3692406 (1972-09-01), Blachut et al.
patent: 3743415 (1973-07-01), Gilman
patent: 4029410 (1977-06-01), Richter

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