I'm working on Peterisoba (well, a not-so-popular race, with 3.75 participants on average). This time - an orienteering section is a must and I'm trying to create something that looks like a map. Base map - I'm trying to use US topo maps + LIDAR height data. Extreme extrapolation since coverage is not that great where I try to use it.
This weekend went experimenting with ocad6, demo of ocad9, several demos of cad software, global mapper 10, demo of course, and quikgrid.
LIDAR data: Puget Sound Lidar Consortium
QuikGrid rocks. It just takes the plain bare Earth text files and produces the contours. 8.2 feet is 2.5 meters. The exported dxf file, however, holds hundreds of tiny segments instead of full contours.
Ocad6 does not work well with merging the contours, ocad9 works much better. Since I do not have 700 spare USD for ocad9 (or how much it costs): import in ocad9 demo, move all symbols to contour lines. Delete the ones which are left (numbers do not get converted). Then select smaller parts of the lines (say, around 5k symbols) and say merge, repeat. Once they are sufficiently merged, larger areas can be selected and merged. Now export to .dxf.
The newly created dxf on my ocad6 was not readable. What now? I have demo version of qcad. Open the dxf file, save as drawing exchange dxf r12 file. Ocad6 can swallow that! Iihaah. Now I have something that looks like contour lines.
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