Hi everyone!
I need to convert some coordinates from geographic to geocentric, X any Y are in SWEREF99 which can be easily converted, but Z is in RH2000 which is used in Sweden and other Scandinavian countries. I am trying to use CsmapReprojector and for vertical handling I used Orthometric height -> Geocentric or ellipsoid height. But then some "geoid height grid" file is needed! I downloaded grid files for FME desktop but nothing for Sweden id available! what shall be done now??
Best answer by daveatsafe
The height grid to convert between WGS84 and RH2000 can be found at 'https://www.lantmateriet.se/contentassets/493a548ae6c14631968c401dc08086c5/swen17_rh2000_txt.zip'
Unzip the .txt file into your FME installation, to \\Reproject\\GridData\\Sweden, and rename to .grd.
FME can't read the grid file directly, but needs a catalog file. In the folder FME\\Reproject\\GeoidHeightGrids\\World create a new text file and rename it to WGS84-RH2000.gdc. Edit the file in Notepad and add the following line:
..\\..\\GridData\\Sweden\\SWEN08_RH2000.grd
In the CsmapReprojector, choose the catalog file WGS84-RH2000.gdc for your height grid.
+19The height grid to convert between WGS84 and RH2000 can be found at 'https://www.lantmateriet.se/contentassets/493a548ae6c14631968c401dc08086c5/swen17_rh2000_txt.zip'
Unzip the .txt file into your FME installation, to \\Reproject\\GridData\\Sweden, and rename to .grd.
FME can't read the grid file directly, but needs a catalog file. In the folder FME\\Reproject\\GeoidHeightGrids\\World create a new text file and rename it to WGS84-RH2000.gdc. Edit the file in Notepad and add the following line:
..\\..\\GridData\\Sweden\\SWEN08_RH2000.grd
In the CsmapReprojector, choose the catalog file WGS84-RH2000.gdc for your height grid.
The height grid to convert between WGS84 and RH2000 can be found at 'https://www.lantmateriet.se/contentassets/493a548ae6c14631968c401dc08086c5/swen17_rh2000_txt.zip'
Unzip the .txt file into your FME installation, to \\Reproject\\GridData\\Sweden, and rename to .grd.
FME can't read the grid file directly, but needs a catalog file. In the folder FME\\Reproject\\GeoidHeightGrids\\World create a new text file and rename it to WGS84-RH2000.gdc. Edit the file in Notepad and add the following line:
..\\..\\GridData\\Sweden\\SWEN08_RH2000.grd
In the CsmapReprojector, choose the catalog file WGS84-RH2000.gdc for your height grid.
Thanks Dave!
+4Hej!
I am trying to convert .las data from elipsoidal to orthometric heights using SWEN17-RH2000 geoid height grid following the same logic provided by @DaveAtSafe, however an error which is linked to a failure of opening the .grd file pops out:
I could not find SWEN08-RH2000.grd file to compare if the format hasn't changed, yet I doubt it would be an issue. Any ideas and suggestions of solving the transformation are welcome.
Thank you in advance,
Vadis
Hi @wandenis!
I have the same problem, did you find any solution? Or maybe @DaveAtSafe can help?
Thanks!
/Magda
+19Hi @wandenis!
I have the same problem, did you find any solution? Or maybe @DaveAtSafe can help?
Thanks!
/Magda
Hi @lazermagda,
The file seems to have been moved. I have updated the location in the answer.
Hej!
I am trying to convert .las data from elipsoidal to orthometric heights using SWEN17-RH2000 geoid height grid following the same logic provided by @DaveAtSafe, however an error which is linked to a failure of opening the .grd file pops out:
I could not find SWEN08-RH2000.grd file to compare if the format hasn't changed, yet I doubt it would be an issue. Any ideas and suggestions of solving the transformation are welcome.
Thank you in advance,
Vadis
Hi,
I am having the same issue. Did you solve the problem?
+19Hi @lazermagda, @wandenis, @hhammarstrand,
The .grd file supplied is the not the same format as the .grd files used by FME. Please use SWEN17_RH2000.txt instead, then change the extension to .grd.
Hi @lazermagda, @wandenis, @hhammarstrand,
The .grd file supplied is the not the same format as the .grd files used by FME. Please use SWEN17_RH2000.txt instead, then change the extension to .grd.
I did try that and that did not work, even after several restarts of FME. However, I solved it when i restarted FME as an administrator.
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