Datum Transformation Guideline/Map for South America

Discussion created by topological_dangles on Dec 7, 2011
Latest reply on Dec 9, 2011 by topological_dangles

I would like to know which datum transformation algorithms are most appropriate for particular regions in South America. I frequently need to transform data from SAD_1969 to PSAD_1956 to WGS_1984 and so on.

Anyone familiar with a cheatsheet or map that details the appropriate algorithm for these particular transformations? I am looking for something similar to the attached image that shows the appropriate transformation algorithm for NAD_1927 to WGS_1984 for regions of North America.