my 2 cents similar to Eric's: . stay at the original resolution . smoothing (using splines or so) is for me a nice to have feature . smoothing can be applied if necessary with a Ojump function that I wrote a while ago and that is in the mapgen toolbox
I hope that makes sense for the others as well, stefan Christopher wrote: > I have the contour line extraction plugin working. See attached .jpg for an > example of contours created at 100m intervals over the Matterhorn tin. There > is still a bit of cleaning up I need to do in order to not have any breaks in > the contours. I should have that done and the code uploaded to the svn > sometime today. > > Now the question: > > Josef Bezdek is doing a similar project for uDig’s SoC. In order to create a > smoother contour, he is dividing up each TIN facet into a bunch of coplanar > smaller triangles then running the contouring routine over those smaller > triangles. For a visual example, see: > http://geomatika.ic.cz/GSoC/Corel/TIN_linear_Con.png > http://geomatika.ic.cz/GSoC/Corel/TIN_Bezier_10.png > http://geomatika.ic.cz/GSoC/Corel/Contour_10.png > > I, on the other hand, have been avoiding any interpolation of the TIN data to > create a denser network. The reason being that we are working with real-world > data that is collected at a certain resolution and any computational > smoothing might or might not match the real world. I figured it would be > important to GIS users that all interaction with data would be at the > resolution it was collected. An analogy would be that in pure math, you can > have as many decimal digits as you want, but in physics and chemistry, you > can only have as many digits as you collected during the data gathering > phase. Digits past the significant digits are dropped because including them > implies that the answer is more accurate than it really is. > > So what do the OpenJUMP GIS users want? Should I allow for interpolation or > should I stay at the resolution that the data was gathered? > > --Christopher > > > > > > ------------------------------------------------------------------------ > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > > ------------------------------------------------------------------------ > > _______________________________________________ > 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 the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
