Real time contour line generation

Details Real time contour line generation Real time contour line generation

2006-02-28

2006-02-28

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S611000, C345S612000, C345S610000

Reexamination Certificate

active

07006106

ABSTRACT:
The generation of contour plot images from elevation data in real time for use in a digital moving map. The contour line interval is dynamically selectable. The elevation data is scanned in 2 dimensions simultaneously, but in a single pass. As the elevation data is scanned for the given contour line interval, a history is maintained of the contour line elevation state in both dimensions. At any point, only comparisons against the two historical values are required to determine if a point on a contour line exists.

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