Hello all I have two pngs of topographic maps from southeastern Brazil (a zip file with images and points is available here: https://www.dropbox.com/ s/mexeh4be46pgsk6/images_georef.zip?dl=0)
I'm trying to georeference them, but with partial success only. In this image (https://www.dropbox.com/s/37xxqp4fkwpdyqh/utm_error.png?dl=0) you can see that the X coordinate is fine, but the Y coordinate of the two maps won't match. Both maps use South American Datum 1969. I selected points near the edges, and used the UTM values. Interestingly, if I use Lat/Long, and place the points at the corners, using decimal degrees, the maps align perfectly. Any help is appreciated -- Prof. Carlos Henrique Grohmann Institute of Energy and Environment - Univ. of São Paulo, Brazil - Digital Terrain Analysis | GIS | Remote Sensing - http://carlosgrohmann.com http://orcid.org/0000-0001-5073-5572 ________________ Can’t stop the signal.
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