azgcorr 7-point Bursa-Wolff datum transformations not working correctly

[mggr]

From Chris Hecker (support ticket #42):

Since all our datasets are in ED50, I was trying in a next step, to get
that working. However, azgcorr seems to have troubles with the -d7
option. I use the following statement (without DEM at the moment):

azgcorr -1 h153131b.hdf -3 h153131b_out_noDEM_ED50.hdf -BIout \
-d7 0 -87 -98 -121 0 0 0 0 -mUTMZ 30 \
-in -p 2 2 -bl 100 -1 \
-v > h153131b_out_noDEM_ED50.txt

This should give me UTM Zone 30 for ED50 mean. However, the -v output to
the txt file shows that it uses Datum Shift type "Dutch" which is made
for RD reference system (not UTM at all) with Bessel ellipsoid etc, so
something different.

Confirmed this does the same for me, example output:

-----------------------------------------------------------------------
azgcorr  -- ver: 4.8.3-lin Jun 12 2007   (C) Azimuth Systems UK 1996, 2007


Note: NO DEM is being used which means that if significant topographic
      variation is present the geocorrected image will be unsuitable for
      accurate georeferencing against map or vector data or for mosaicing
      with adjacent lines, see User Guide for more details

data recorded in year: 2006  date: 02/06/2006
CCD type [3]: SPECIM sensor details and data

HDF level 1 input file: h153131b.hdf
No CApsfov table on hdf - using default optic details

Scanner: CCD image (CAimage) pixels: 320 lines: 3336 bands: 237
  config: Specim HAWK  SWIR
  view angles port: -11.8526 star: 11.8526

Navigation...
  navigation spheroid: user  map projection spheroid: INTERN
  datum shift type: DUTCH  map projection: UTM
...

Contacting Bill to see if this is a misuse/misunderstanding on our part or a bug in the option-reading/display code.

[mggr]

Bill thought it was a misuse of the command line on our part but, after a response, has added additional output to make explicit exactly what parameters have been used (not sure if there were any other changes). New azgcorr 4.8.4. It looks ok, but not sure how to test - closing this ticket until there's further error reports.