[Proj] About UTM projection: sphere, ellipsoid or both?

stevejking stevejking at talktalk.net
Thu Jun 30 10:32:23 EST 2011

Not sure if it answers your question. I've used UTM with the WGS84 ellipsoid.

"+proj=utm +zone=40 +north +ellps=WGS84 +datum=WGS84 +units=m  no_defs"

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