Hi Larry, If you "open" a file or load records from the database I would typically want the features to retain their original projection and reproject on the fly when rendering them in a different projection. The reason for this is to ensure you don't artificially create any coordinate drift when you haven't actually modified the feature. My clients are always worried about using different vendors algorithms for projection.
If however you were to "import" files then you could argue that you want to do the projection at that point. There maybe a case to have a cached reprojected version of the geometry to speed up rendering. Or another alternative would be to give an option to either keep the original geometry or reproject, then that keeps both types of users happy. I just thought of another argument to reproject on the fly, some kinds of users may switch from one projection to another while using the data. Paul Larry Becker wrote: > I have a question about Coordinate Projection in JUMP. Does it happen > when the dataset is opened (as with ArcMap)? If so, what happens when > you save the dataset? Is it saved in the original projection (i.e. > reprojected back) or is it saved with the new projection? I can see > use cases for both. > > thanks, > Larry > > On 6/26/07, Sunburned Surveyor <[EMAIL PROTECTED]> wrote: > >> Jody has offered to help if there is interest in prefecting/fixing the >> code that Edgar wrote for Coordinate Projection using the GeoTools >> library. >> >> I'd take this on myself but I have already made a lot of other commitments. >> >> If we have any takers I will let Jody know. This sounds like a great >> opportunity to get projection support into OpenJUMP. >> >> SS >> >> ------------------------------------------------------------------------- >> This SF.net email is sponsored by DB2 Express >> Download DB2 Express C - the FREE version of DB2 express and take >> control of your XML. No limits. Just data. Click to get it now. >> http://sourceforge.net/powerbar/db2/ >> _______________________________________________ >> Jump-pilot-devel mailing list >> Jump-pilot-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel >> >> > > > ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel