Hi again Andre and Marco,
I've been investigating and the latest version of EPSG database (v8.4) already
incorporates a lot of changes compared to the datum_shift.csv from gdal.
>> tfm 1571 is a bug in the EPSG database. It should be "Amersfoort to
>> ETRS89 (1)", but somehow the source CRS
Hi Andre!
> tfm 1571 is a bug in the EPSG database. It should be "Amersfoort to
> ETRS89 (1)", but somehow the source CRS got wrong.
>
> It was deprecated in 2001, and replaced by tfm 1751 (4289 to 4258) under
> the same name.
> For some reasons, EPSG still keeps it in its database, marked
Am 20.06.2014 13:41, schrieb Marco Hugentobler:
No, those parameters that have +towgs84=565.04(...) are not associated
with any portuguese transformation. These parameters belong to epsg_nr
1571. The only point of contact between this entry and the portuguese
entries, is that both uses 4258 (Geo
Hi Marco,
>> Since there is now a duplication, I think you can delete the grids entry
> with coord_op_code 14 and 17.
>
> With which other entries are they duplicated? Seems to me there are no two
> entries with same source_srs / dest_src / gsb file ?
>
coord_op_code 14 uses t
Hi again,
- Mensagem original -
> DE: Pedro Venâncio
>
>
However I came across something quite odd. In the Datum
> Transformation window, automatically arise some strange transformations (red
> in
> the image http://goo.gl/iIWOuw). These transformations give huge errors, and
Since there is now a duplication, I think you can delete the grids entry with
coord_op_code 14 and 17.
With which other entries are they duplicated? Seems to me there are no two
entries with same source_srs / dest_src / gsb file ?
No, those parameters that have +towgs84=565.04(...)
Hi Marco.
>> Added two ntv2 entries and updated two entries, hope it is correct now.
Great Marco, it is working now with ntv2 grids.
Since there is now a duplication, I think you can delete the grids entry with
coord_op_code 14 and 17.
>> I still feel uncomfortable to delete / update
Original Message
Subject: Re: [Qgis-developer] Datum Transformation - parameters for
mainland Portugal
Date: Fri, 20 Jun 2014 09:35:00 +0200
From: Marco Hugentobler
To: Pedro Venâncio
Hi Pedro
Added two ntv2 entries and updated two entries, hope it is correct
