[Manifold-l] distance problems converting to KML files

[adamw at manifold.net]

My apologies for not responding earlier.

> > 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.
>
> This distance I was measuring was using the tracker tool but I had
> also specified distance when drawing things like buffers or rings
> around a point. These distances seem fine in Manifold and match up as
> expected, ...

These were Euclidean distances.

> ... it's when I export the file to a KML and then use the measurement
> tool in Google Earth that I get big differences, around 15% or so.

These are likely ellipsoidal distances.

So, I guess these are just two different types of distances.

--
Adam Wachowski
Manifold Development Team