This function writes the field metadata for a grid field not defined by the Grid API.
Note: Array ordering of variables used or returned by this routine changed in IDL 5.5. Programs written for versions of this routine prior to IDL 5.5 may need to be modified to work correctly with the current version.
status = EOS_GD_writefieldmeta(gridID, "ExternField", $
Result = EOS_GD_WRITEFIELDMETA(gridID, fieldname, dimlist, numbertype)
Returns SUCCEED(0) if successful and FAIL(–1) otherwise
Grid id (long) returned by EOS_GD_CREATE or EOS_GD_ATTACH.
Name of field (string) that metadata information is to be written.
Dimension list of field (long).
Number type of data in field (long).