【转帖】ransforming Coordinates To Longla
 

transforming coordinates to long/lat
transforming coordinates to long/lat
as part of a solution to
in order to do proper transformation, i need various information on the drawing's coordinate system (datum definition, projection, ellipsoid, etc). is there a proper way to retrieve such information using dwgdirect?
afaik projection data was added to dwg only in autocad 2009.
(acdbgeo* classes)
we don't support it yet.
"latitude" and "longitude" database variables are approximate, to use by the sun object.
vladimir