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.