The file, WDBI.dx, used by that macro has the coordinates as provided in the original World Data Bank I file. The coordinates are raw lat-lon, cylindrical equidistant, with lon as degrees east (-180 to 180). A simple transformation such as Mark/Compute/Unmark or Transform will only partially work. The problem is lines that cross a nominal Int'l Date Line. That transformation will force the "pen" to scrawl across the page. You would have to check for these particular lines after the transformation and repair them.
If you want to see ASCII, you can Import and then Export in an ASCII flavor .dx file. The package of projections I put together some many years ago is geared around data in [lat degrees north, lon degrees east, +/- 180]. This was fine for my own needs at that time. Since there was not much user interest then, there wasn't much motivation to make them more general-purpose. You would have to modify the map file or use a different one and/or modify your data. Some of the projections may have to be changed because of the different coordinates. At least with everything as macros, you can see how the projections work and modify them. "Sharon Cady" <[EMAIL PROTECTED]>@opendx.watson.ibm.com on 02/12/2001 02:58:07 PM Please respond to [email protected] Sent by: [EMAIL PROTECTED] To: [email protected] cc: Subject: [opendx-users] World Map coordinate system I'm almost embarrassed to ask, since I'm obviously missing something (probably simple), but how do I shift the coordinate system of the cylindrical equidistant (rectangular) global map so that it goes not from -180 to -180 degrees longitude but instead ranges 0-360 ? There are inputs into WorldMapProjections which ask for centroid of the projections and also the range, but manipulation of these don't change the positions of the points in the map, just the view of what is plotted (it seems). I've tried shifting the positions myself (mark/compute); however, with my new map ranging 0-360 longitude, I can only see the 0-180 part (the 180-360 is ignored, apparently). Is there something somewhere which limits the view of this plotted object ? I looked in the wdbi.dx file to see if I could find anything, but I didn't really see much in there, except binary data. I can get a map to plot which "looks" like how I want it, but of course the positions are incorrect, since they are forced to range -180 - 180. My data won't overplot on this, unless I juggle that all around too.
