Does anybody have any experience with plotting Smith & Sandwell 2-minute Mercator-projected grids in ArcGIS? I've downloaded one in two formats: ers and img. I've found tools for processing .img data called Generic Mapping Tools (GMT). Within this library there are commands which allow manipulating img grids, which is just what I need. This example uses the img2grd command which I can't find within the GMT library. The only tool I found so far was img2mercgrd but it wasn't successful.
I would be grateful if there is anybody who can give guidance in how to process this dataset to GIS format.