Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
Pu Bu Ci Ren (pubu@gfi.uib.no) writes: > I am trying to use IDL to overplot contour on a certain > map_projection, but I can only get continent boundary. Does anybody know > how to do it, I am running IDL on windows, pretty old version (3.00). > Can anybody give me any hint ? Here is a hint: you may want to upgrade. :-) I suppose it is more evidence of getting old, but I can't even *remember* IDL 3.0! You might want to upgrade (or buy my book) just for the better manuals. But I think that even from the get-go you could put contours on map projections. Try this after you have set up your map projection: Contour, data, x, y, /Overplot Where your x and y vectors are expressed in units of latitude and longitude. (These vectors are REQUIRED when outputting on top of a map projection.) Tashi Delke, David ----------------------------------------------------------- David Fanning, Ph.D. Fanning Software Consulting E-Mail: davidf@dfanning.com Phone: 970-221-0438 Coyote's Guide to IDL Programming: http://www.dfanning.com/