Cost zones
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United States of America Patent
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-
Feb 15, 2000
Issued Date -
N/A
app pub date -
Oct 21, 1997
filing date -
Dec 29, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
A cost zone about an origin on an digital map includes the area on the map that can be traveled to, from the origin, which has a cost of travel less than a predetermined cost. The cost can be measured in distance, time of travel, ease of turning, tolls, etc. The steps of creating a cost zone include identifying a set of decision points on the map that are within a predetermined factor of the desired cost, triangulating the decision points to create a set of triangles and interpolating along a subset of the sides of the triangles to estimate the locations along the sides that can be traveled to at the desired cost.
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