I have some data in Provisional South American Datum 1956, and I need to project it to Web Mercator with WGS84 as the datum.
When I use the project tool in ArcGIS desktop, it requires a Geographic Transformation, and offers me 13 different ones: from
How do I find out which is the transformation meant for my area?
I remember finding a pdf on the ESRI forums several years ago, which showed the various transformations between NAD 83/27 & WGS 84. Is there something similar for all transformations in ArcGIS?