JGD2K via Grid Files

This method is used to transform data from the older Tokyo Datum to the Japanese Geodetic Datum of 2000 (JGD2K). Associated data files define the transformation, and must be purchased from the Geographic Institute of Japan. The data files involved are listed in the Geodetic Data Catalog file TokyoToJgd2k.gdc. Refer to this file for more information.

The data files, as supplied by the Geographic Institute of Japan, are in the form of text files, with no guarantee of records of fixed length, and which are not in any specific order. Since the most popular of these files covers all of Japan, the size of this particular file is quite large (on the order of 12 MB). FME will, therefore, convert the text file into a binary form upon its first use.