US 4,148,580 A · Process for making shade relief maps and the map made thereby

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.

Claims6

Dependent claims

A method for manufacturing a slope related shade relief map having shade values thereon proportional to the degree of slope, said method comprising the steps of:

providing a discrete weight and configuration study having values proportional to the degree of actual slope appearing in the area represented;
converting the discrete weight and configuration values by selective distortion thereof to produce an indiscrete shade configuration for use in image production, said indiscrete shade configuration having shade density values proportional to the degree of slope in said area;
providing a study of selected features in said area other than slope, for use in image production;
combining the proportional shade density value image and features image in superimposed registry;
and reproducing the combined image to produce a slope related shade relief map having representations of relief thereon, said relief comprising a manufactured shade with the value thereof proportional to the degree of actual slope appearing in the area represented.

2 more elements

Dependencies are inferred from the claim text.

Process for making shade relief maps and the map made thereby

Life of this patent

Process for making shade relief maps and the map made thereby

Life of this patent

Abstract

Claims6