Method of sampling a terrain data base

Details Method of sampling a terrain data base Method of sampling a terrain data base

1994-01-18

1997-05-13

Zimmerman, Mark K.

G06F 1500, G05D 100

Patent

active

056300352

ABSTRACT:
A convergence model is shown and described for accommodating variation in data post spacing in a digital terrain elevation database (DTED) based on longitude and latitude address values for data posts. Under such a database structure, data posts lying along lines of latitude vary in spacing according to latitude, and converge at the poles with zero spacing therebetween. To scan a circular region of data posts relative to a given data post, e.g., a threat installation, this variation in data post spacing is considered by appropriately scaling sample step spacing along radials traversed in executing a radial spoke scan pattern. In this manner, a circular region of data posts surrounding a given data post may be sampled using simple, dedicated hardware despite this variation in data post spacing.

REFERENCES:
patent: 3071873 (1963-01-01), Zahner et al.
patent: 4899293 (1990-02-01), Dawson et al.
Thompson et al., "Digital Terrain Analysis Station (DTAS)", Dept. of Army Unclassified Report No. ETL-R040, Aug. 28, 1982.

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