WAY OF HACHURES ARRANGEMENT ON CONTOUR SHEET, COMPUTER WAY OF RECOGNITION OF PARTS OF HORIZONTALS WHICH ARE PASSING THROUGH AREAS WITH SMALL BIASES ON CONTOUR SHEET, AND COMPUTER WAY OF RECOGNITION OF MINIMUM OUTLINES MADE BY HORIZONTALS AND FRAME OF CONTOUR SHEET Russian patent published in 2009 - IPC G06T17/50 G01C11/00 

FIELD: physics; image processing.

SUBSTANCE: invention concerns area of base maps creation by image processing. Essence: horizontals where hachures should be placed are selected in an interactive mode. The hachures are drawn from the specified points in the set direction. Slope directions in vicinities of the specified points are thus defined, using the information on adjacent horizontals, and as the specified set direction, the specified direction of a slope for correct direction of hachures concerning horizontals is used. For automatic arrangement of hachures are used: a computer way of recognition on the contour sheet of parts of the horizontals which are passing through areas with small biases, and a computer way of recognition of the minimum outlines left horizontals and the frame of the contour sheet.

EFFECT: development of an effective way of base maps creation by image processing.

12 cl, 11 dwg