Hi all, in particular Even, Jeff,
Confirmed that this (no coordinate shift in MapServer renders for
EPSG:4326 to EPSG:28992) version-combination works on Ubuntu 20.4 with
custom compiles:
- MapServer 7.4.3 and Proj 5.2 and GDAL (I think) 3.0.4 (default on
Ubuntu 20.4) **
As Even replied (and Jeff suggested):
"...you should try to stick to one of the following combinations:
- With MapServer 7.4 or 7.6: GDAL 2.x + PROJ 5.x
- With MapServer >= 7.6: GDAL 3.x + PROJ >= 6.x"
** I am reporting/replying as a proxy for a customer who does the custom
compiles. They decided to stick with the default "apt" installs on clean
Ubuntu 20.4 (without Ubuntu-GIS PPA), that is: MapServer 7.4.3, Proj
6.3.1, GDAL 3.0.4. Solving it, by adding the full, explicit "init" proj
string of EPSG:28992 for each Layer in the MS mapfile.
Sorry that I could not be of more help. Think we all should be, at least
I am, grateful with the boost on Proj-development from (20 years?)
Proj.4 on! I am close to the Dutch OSGeo community, so will keep you
updated.
Best,
Just
On 18-09-20 10:37, Just van den Broecke wrote:
Hi Even,
(Sorry mispelled your name in last email).
On 17-09-20 21:54, Even Rouault wrote:
On jeudi 17 septembre 2020 21:20:56 CEST Just van den Broecke wrote:
> Hi Evan,
>
> Thanks for your quick reply! Will try out other combinations of
proj and
> MS with custom compiles and let you know here.
>
> I did not quite grasp your last paragraph, but I am no expert in the
> subject. For The Netherlands the expert is Lennard Huisman, formerly
> from Dutch Kadaster. IMHO he donated to proj the most accurate
> transformation with an NTV2 grid for the "real" Dutch coordinate
system
> (another EPSG code), which was set out by hand via triangulation.
I suspect you're speaking about the rdtrans2008 or rdtrans2018 grids
that are for transformations between the Amersfoort datum and ETRS89.
I can't see any grids between Amersfoort and WGS84 registered in EPSG,
because of the time-dependent nature of WGS84 (well you could use the
grids for transformation to WGS84 if you're ready to consider ETRS89
== WGS84 for your purposes).
Yes, referring to those grids, indeed using ETRS89 for the reasons you
give (Eurasian tectonic plate I think). A sidestep.
EPSG:28992 is accurate enough for our purposes and easier to deploy.
Jeff gave some MS-Proj version combination compile hints we are going to
try out (thanks Jeff!). Thanks again, Even, also for your hard work on
Proj.
Best,
Just
--
Spatialys - Geospatial professional services
http://www.spatialys.com
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