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Question

Error while performing a grid transformation

L
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Hello,

I created a new coordinate system + transformation based on a grid .gsb file.

 

While using the Csmapreprojector the transformation fails, can someone help me to figure out the reason ?

 

Thank you very much.

Here is the transformation I defined

Here is the error I get :

CsmapReprojector_8(TeeFactory): CsmapReprojector_8: Reproject: Could not reproject the geometry of the preceding feature: Reprojector: Could not create reprojection engine

CsmapReprojector_8: Reproject: Could not reproject the geometry of the preceding feature: Reprojector: Could not create reprojection engine

 

 

and here is the Csmapreprojector configuration

 

5 replies

jneujens
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  • jneujens
  • May 4, 2018

Did you try to do it with other coordinate systems? Are does it always fail?

If you created this transformation I think you will have to share the file to know what is going wrong.

L
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jneujens wrote:

Did you try to do it with other coordinate systems? Are does it always fail?

If you created this transformation I think you will have to share the file to know what is going wrong.

Hello,

 

I've never tried with other another coordinate system

 

Here is the transformation file I created

 

trans.zip

 

 

takashi
Contributor
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  • takashiContributor
  • Contributor
  • May 4, 2018
I cannot find a coordinate system called "ITRF" in my Coordinate System Gallery. Is it a custom coordinate system that you defined?

 

 

L
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takashi wrote:
I cannot find a coordinate system called "ITRF" in my Coordinate System Gallery. Is it a custom coordinate system that you defined?

 

 

Yes it is a custom one I added

 

 

jneujens
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  • jneujens
  • May 9, 2018

lianaolianov, as far as I can check, I think all the necessary parameters are there.

You are 100% sure your custom coordinate system is error proof?

The NTv2 grid file you use to transform: are you sure it covers the coordinates being transformed?

 

If not, the transformation will not work.

 

 

You might try to add a 'FALLBACK' parameter in your transformation file. It will use a different transformation in case your .gsb file does not cover the coordinates being transformed. If you add this parameter and the transformation works, I think you have your problem?

 

More information on these parameters can be found here: http://docs.safe.com/fme/2017.1/html/FME_Desktop_Documentation/FME_Workbench/CoordSys/coord_sys_custom_transformation.htm

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