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14sep2005 Areometer

Inspired by the , I made a map that computes the area enclosed by a given path: the Google Areometer.

Actually there already was at least one that does this, but it only does a planar approximation. My version uses completely accurate spherical geometry, including drawing great circle arcs instead of straight lines.

There are a couple other features of interest to Google Maps authors: it remembers the most recent position/zoom/map-type in a cookie; and it correctly handles lines & regions that cross the International Dateline.

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