Interesting ... So you are assuming the coordinate system is always cartesain (I know I do in GtkCAD). Never thought about the possibility of an alternative system. cheers, H. James Parker Naval Architect Gibbs and Cox, Inc. office) 703-416-3625 fax) 703-416-3679 jparker@xxxxxxxxxxxx *********************************************** This e-mail and any attachments contain privileged, business sensitive, and/or proprietary information. The information is intended to be for the use of the individual or entity named. If you are not the intended recipient, be aware that any disclosure, copying, distribution or use of this information is prohibited. If you have received this electronic transmission in error, please immediately notify the Gibbs & Cox, Inc. Security Supervisor at 703.416.1240 or via email at Security@xxxxxxxxxxxxx *********************************************** >>> ewilhelm@xxxxxxxxxxxxx 8/26/2004 5:01:52 PM >>> # The following was supposedly scribed by # Janek Kozicki # on Thursday 26 August 2004 02:59 pm: >speaking of UCS, I always dreamed about adding UCSes like mercator >projection, or spherical projection. So that you could draw a map on > a 2D plane, then just switch UCS to spherical, and voila - you got > a map on a 3D globe. This is not likely to be storable in rhizopod. Maybe sardine. You could of course implement this in a program that uses the rhizopod hub, but it would require a "system_type" or some other attribute to the UCS entity which would not be preservable across conversions. Regardless, the entities will always be stored in world coordinates in rhizopod, so the usage of this would be up to the program (e.g. the entered coordinates would have to be calculated into WCS before storing them.) --Eric -- "Left to themselves, things tend to go from bad to worse." --Murphy's Corollary