Australian NTv2 files

Support is included for the Australian NTv2 (National Transformation, Version 2). These grid-shift files are provided in the $PCIHOME/etc/grid directory.

Datum-definition file

The file contains the PCI datum codes defined for the grid-shift files, as follows:

                "D-21","GDA94 (from AGD66, NTv2)","E008","Australia","D029","A66_National_13_09_01_.gsb"
                "D-22","GDA94 (from AGD84, NTv2)","E008","Australia","D030","National_84_02.07.01.gsb"
                "D-25","GDA2020 (conformal, from GDA94, NTv2)","E008","Australia","-D536","GDA94_GDA2020_conformal.gsb"
                "D-26","GDA2020 (conformal and distortion, from GDA94, NTv2)","E008","Australia","-D536","GDA94_GDA2020_conformal_and_distortion.gsb"
                "D-27","GDA2020 (conformal, from GDA94, NTv2)","E008","Australia (Christmas Island)","-D536","GDA94_GDA2020_conformal_christmas_island.gsb"
                "D-28","GDA2020 (conformal, from GDA94, NTv2)","E008","Australia (Cocos Islands)","-D536","GDA94_GDA2020_conformal_cocos_island.gsb"