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Need help coordinate system to OSM

Question asked by jpsmmatos on May 22, 2015
Latest reply on May 22, 2015 by sephefox

Hello eveyone,


I have a shapefile with unknown coordinate system, and have another with WGS 1984, and I need to match both in order to use in JOSM.  i've tried various instructions to project but without sucess. I tried to define profjection , but I do not know the coordinate system of the shapefile, what should I do. I don't have much experience in arcgis.


Thanks in advence


The prt file i took from the web, and the other is the unknown file I suspect datum 73.