[Manifold-l] distance problems converting to KML files
adamw at manifold.net
adamw at manifold.net
Tue Jun 26 08:40:08 CDT 2007
> If I project a drawing to mercador in miles and select objects
> contained in a 35 mile radius and then export the results to a KML
> file the distance across the area selected measured in Google Earth is
> not the same as measured in Manifold.
How exactly have you been measuring the distance in Manifold? If you were using the Tracker tool without the Ctrl button, Manifold was reporting a Euclidean distance. If you were using the Tracker tool with the Ctrl button, Manifold was reporting an ellipsoidal distance. The difference between Euclidean and ellipsoidal distances can be pretty large.
I am not sure what type of distance is being reported in Google Earth, but it might not coincide with whatever type you used in Manifold.
--
Adam Wachowski
Manifold Development Team
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