The new guide to add the ICC's NTv2 to ArcGIS (tool GTF in ArcToolBox) is now available on the (enllaç no vinculat) section.

This guide describes the procedure to add the ED50 to ETRS89 NTv2 ‘100800401.gsb’, computed by the Institut Cartogràfic de Catalunya, within the ArcGIS geographic transformations, using the ArcToolBox tool “Create Custom Geographic Transformation”. The procedure has been tested with ArcMap 9.2, 9.3, 9.3.1 and 10.0.

Guide to add the NTv2 to ArcMap-Geogtran rests for those users of the 9.1 version or previous.