Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
mbweller@gmail.com writes: > How do you plot a simple ascii grid of values spatially? I have a .dat > file that contains 180 rows and 360 columns corresponding to a range > of 90 to -90 (180:rows:latitude) and 0 to 360 > (360:columns:longitude). I believe that the position of the cell at > Column 1, Row 1 corresponds to a cell of position 90n, 89n, 180w, 179w > but > cannot be sure until it is mapped. So, I need each cell value to > correspond to a 1x1 deg lat/lon cell size when plotting. Is there a > way to do this easily? I don't know. I've seen this request twice, and it still looks like an image to me, but what do I know. :-( I'd display it like this: IDL> ImgWin, asciiData, XRange=[0,360], YRange=[-90,90] Then, you can interactively play around with the data and learn its value at a particular latitude and longitude. http://www.dfanning.com/catalyst/imgwin.html Cheers, David -- David Fanning, Ph.D. Fanning Software Consulting, Inc. Coyote's Guide to IDL Programming: http://www.dfanning.com/ Sepore ma de ni thui. ("Perhaps thou speakest truth.")