Opened 10 years ago
Closed 8 years ago
#73 closed defect (fixed)
Prefer datum shift 1510 over 1766 for CH1903 (EPSG:4149)
| Reported by: | schmandr | Owned by: | warmerdam |
|---|---|---|---|
| Priority: | normal | Milestone: | 1.4.3 |
| Component: | libgeotiff | Version: | |
| Keywords: | Cc: |
Description
For CH1903 (EPSG:4149) the datum shift 1510 should be preferred over 1766, in order to use the datum shift parameters 674.374, 15.056, 405.346 rather than the rounded parameters 674.4, 15.1, 405.3.
In the past the non-rounded values were included as an override line in gcs.override.csv. However, in changeset 1819 (http://trac.osgeo.org/geotiff/changeset/1819/trunk/libgeotiff/csv/gcs.override.csv) they were removed during a refactoring. As it's still true that for CH1903 the non-rounded datum shift parameters should be used, this override should be included again. For the new approach this means preferring datum shift 1510 over 1766.
See http://lists.osgeo.org/pipermail/gdal-dev/2015-January/040761.html for details and the reasons for using the non-rounded parameters.
Change History (1)
comment:1 by , 8 years ago
| Milestone: | → 1.4.3 |
|---|---|
| Resolution: | → fixed |
| Status: | new → closed |
r2746 "csv/datum_shift_pref.csv: add override for CH1903 (EPSG:4149) (fixes #73)"
Updated files will be available per the EPSG v9.0 upgrade: https://trac.osgeo.org/geotiff/ticket/83