Method and apparatus for contouring data particularly useful in

Details Method and apparatus for contouring data particularly useful in Method and apparatus for contouring data particularly useful in

1989-06-29

1990-12-11

Cuchlinski, Jr., William A.

Geometrical instruments

Miscellaneous

Light direction

36447431, G01B 314

Patent

active

049760351

ABSTRACT:
Method and apparatus are described for determining the contour lines for gridded data defining a four-sided cell composed of two grid lines along the X-axis and two grid lines along the Y-axis, involves the steps of sorting four data points according to their values along a selected one of the two grid axes; connecting the point of minimum value along the selected grid axis to the point of second minimum value along the selected grid axis; and connecting the point of third maximum value along the selected grid axis to the point of maximum value along the selected grid axis. In the described embodiment, the contour lines represent common elevation points in a topographic map.

REFERENCES:
patent: 2753756 (1956-07-01), Santoni
patent: 2811445 (1957-10-01), Mahan et al.
patent: 3989933 (1976-11-01), Inghilleri
patent: 4491906 (1985-01-01), Kishi et al.
patent: 4528632 (1985-07-01), Nio et al.
patent: 4581698 (1986-04-01), Jaswa
patent: 4709482 (1987-12-01), Matsucika et al.

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