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- Path: sparky!uunet!cs.utexas.edu!asuvax!ncar!vexcel!copper!slate!cogs1
- From: cogs1@slate.mines.colorado.edu (THOEN WILLIAM )
- Newsgroups: comp.infosystems.gis
- Subject: Re: CIA World Map
- Message-ID: <1992Dec30.051113.37065@slate.mines.colorado.edu>
- Date: 30 Dec 92 05:11:13 GMT
- References: <Pine.3.05.9212291052.A27042-b100000@minerva.cis.yale.edu>
- Organization: Colorado School of Mines
- Lines: 28
-
- jwright@MINERVA.CIS.YALE.EDU (Geoffrey Wright) writes:
- : I would like to use one of the CIA World Data Bank II map files that I
- : have gotten from an FTP site. I am not sure if it can be imported into
- : other GIS packages or if it can only be used with VPlot. The file
- : appears in the following format:
-
- <binary junk deleted>
-
- : Does this mean that it is a compressed binary file? What do I have to do
- : to use it?? Thank you for any assistance.
-
- Jef, if that is the 15 Mb CIA file, then it is indeed in a binary format
- and needs to be converted before it will work with any GIS. It's a clever
- job, too, but if you can't program in C, you're going to be a bit
- frustrated. If you can read C, look at the file 'domap.c' that comes with
- it and substitute your own output for the calls to VPLOT. It took me about
- a half day to get something working to translate this file to ASCII
- lat/long coordinates, but I fiddled with it a lot longer than that to add
- my own graphics. Even so, I still ended up with a glitch that translated
- half of South America into the Atlantic. The point that pooched it was
- right on the equator, but I don't know if it's my software or the data
- itself that has a problem with an exact zero.
-
- Good luck (it's a worthwhile file, but the Digital Chart of the World looks
- even better... and has it's own Hell of a data format to crack! :-)
-
- - Bill Thoen
- cogs1@slate.mines.colorado.edu
-