[mapserver-users] Coordinates shifted for EPSG:28992

[Just van den Broecke]

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

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