Any Brazilian or international coordinate system experts in the house? I have a shapefile of Brazilian data which came without a PRJ file to give away essential information about the coordinates used. The numbers are large so I guessed they were metres on a UTM projection. Since the data covers all of Brazil (which crosses multiple UTM zones), I guessed on a mid-strip of 22S which turned out to be "almost right". Viewing on ArcView or MapInfo Pro, I see a (slightly varying) ~100km shift west for the data when overlaid on reference data. The vertical seems about right. This error is much more than I would expect for a datum issue but I tried all the common ones anyway - no real difference. Does anyone know if Brazil uses some system which differs from the standard zones such as a different false easting?
Regards, Warren Vick Europa Technologies Ltd. http://www.europa-tech.com --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 16235
