[Proj] Local Level

Noel Zinn ndzinn at comcast.net
Thu Oct 23 07:30:26 EDT 2008

FYI, the current version of the EPSG Guidance Note 7-2 presents the
algorithm to do this (called topocentric coordinates by the EPSG).  If this
is not in proj4 already, I would support its inclusion.  Also FYI, if the
vertical dimension of topocentric coordinates is ignored, the remaining
horizontal coordinates define the ellipsoidal orthographic projection.
-Noel Zinn



From: proj-bounces at lists.maptools.org
[mailto:proj-bounces at lists.maptools.org] On Behalf Of Eran Burstain
Sent: Thursday, October 23, 2008 4:55 AM
To: proj at lists.maptools.org
Subject: [Proj] Local Level


Hi !
Can I convert a point from geocentric to Local Level Projection (also called
Local Tangent Plane) ?
It's only Rotation and Shift from the geocentric representation.

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