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How to define the Datum/Vertical Co-ordinate System

  • August 10, 2017
  • 5 replies
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Hi,

I am after a method to define the vertical co-ordinate system of features being output, particularly after using the 3DForcer or Vertex Creator.

The data coming in doesn't already have the height datum defined, particularly as it is often from CSVs.

Thanks

-Jack

Best answer by bruceharold

I don't think FME has any concept of vertical datum as a dataset property. If you have ArcGIS you could define the coordinate system including the vertical CS in a shutdown script.

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5 replies

trentatsafe
Safer
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  • Safer
  • August 10, 2017

Hello @jecollins

I believe the CSMapReprojector may be the transformer that will solve your issue. Not only are you able to do a standard reprojection, but you are also able to set the vertical handling. The documentation for the CSMapReprojector can be found here:

 

https://docs.safe.com/fme/2017.0/html/FME_Desktop_Documentation/FME_Transformers/Transformers/csmapreprojector.htm

 

 

Depending on the location of your data, you may also try the GridInQuestReproject(Ireland/UK data) or the GtransReprojector(Sweden data).

Some articles that may be beneficial to providing some more information can be found here:

 

https://knowledge.safe.com/articles/585/using-coordinate-systems-within-fme.html

 

https://knowledge.safe.com/articles/29325/creating-vertical-adjustment-grid-files-for-use-wi.html

 

I hope that helps.


bruceharold
Supporter
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  • Best Answer
  • August 10, 2017

I don't think FME has any concept of vertical datum as a dataset property. If you have ArcGIS you could define the coordinate system including the vertical CS in a shutdown script.


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  • Author
  • August 15, 2017

Hello @jecollins

I believe the CSMapReprojector may be the transformer that will solve your issue. Not only are you able to do a standard reprojection, but you are also able to set the vertical handling. The documentation for the CSMapReprojector can be found here:

 

https://docs.safe.com/fme/2017.0/html/FME_Desktop_Documentation/FME_Transformers/Transformers/csmapreprojector.htm

 

 

Depending on the location of your data, you may also try the GridInQuestReproject(Ireland/UK data) or the GtransReprojector(Sweden data).

Some articles that may be beneficial to providing some more information can be found here:

 

https://knowledge.safe.com/articles/585/using-coordinate-systems-within-fme.html

 

https://knowledge.safe.com/articles/29325/creating-vertical-adjustment-grid-files-for-use-wi.html

 

I hope that helps.

Thanks for that, I'll take a closer look. I was hoping to avoid mucking around with conversion grids, particularly as in Australia we use a slightly funky datum for engineering. Thanks!

 

 


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  • Author
  • August 15, 2017

I don't think FME has any concept of vertical datum as a dataset property. If you have ArcGIS you could define the coordinate system including the vertical CS in a shutdown script.

Thanks Bruce, I've had a go at that and as soon as I fix the issue of it not playing nice with ArcPy I'll get back on how it works.

 

 


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  • Author
  • September 22, 2017

I don't think FME has any concept of vertical datum as a dataset property. If you have ArcGIS you could define the coordinate system including the vertical CS in a shutdown script.

This works perfectly, I had to unknot an issue with the python compatibility first but after that it works a treat. Thanks.