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"Flattening" symptom when reprojecting

  • February 21, 2018
  • 7 replies
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Hi all!

I'm trying to do a simple reprojection from ESPG:3021 to ESPG:3006 but there seems to be some kind of problem. The transformer(?) are "flattening" the polygons (zipcode areas) in the north-eastern part of Sweden. Why? And what can I do to solve or work around this?

Thank you!

:nicklas

Best answer by daveatsafe

Hi @nijo99,

I am happy to announce that we have fixed the problem with the bounds in the Mapinfo coordinate system definitions. This fix is available in the latest beta version of FME 2018.1, which can be downloaded from www.safe.com/beta.

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7 replies

daveatsafe
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  • February 21, 2018

Hi @nijo99,

I couldn't reproduce this problem in FME 2017 with a shape file of the Swedish boundary, with any of the reprojector transformers.

Would you mind providing more details on your transformation, and possibly a copy of your workspace and a sample of your source data? If you don't want to share these publicly, you can email them to support@safe.com, Attn Dave.


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  • Author
  • 4 replies
  • February 22, 2018

Hi @DaveAtSafe,

It's a very simple transformation since I only want to change the CRS. I've tried the transformers "Reprojector" and "CsmapReprojector". I've also tried without any transformer, just changing the CRS in the Writer and run the translation. The result is the same.

I'm using the format MapInfo TAB, but have also tried Esri Shape..

I managed to do a workaround; first reproject to WGS84 [EPSG:4326] then to SWEREF99 TM [EPSG:3006], that did the trick! :)

I've emailed my data and workspace to , if you want to take a look.

Thanks!

:nicklas


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  • Author
  • 4 replies
  • February 22, 2018

Hi @DaveAtSafe,

It's a very simple transformation since I only want to change the CRS. I've tried the transformers "Reprojector" and "CsmapReprojector". I've also tried without any transformer just changing the CRS in the writer, the run the translation. The result is the same.

I'm using the format MapInfo TAB but have also tested with Esri Shape.

I made a workaround; Reprojecting to WGS85 [EPSG:4326] then to SWEREF99 TM [EPSG:3006], that did the trick! ;)

I've sent my data and workspace to if you want to take a look!

Thanks!

:nicklas


daveatsafe
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  • February 22, 2018

Hi @nijo99,

We seem to have improper bounds set in FME's Mapinfo coordinate system definition for EPSG:3006. The data is being clipped to these bounds when writing to Mapinfo. I have created a problem report for our development team to have this fixed.

The Mapinfo writer allows you to override the default bounds in the Parameters. Please use the projected bounds values provided at https://epsg.io/3006 for the override. This will prevent the clipping.


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  • Author
  • 4 replies
  • February 27, 2018

Hi @nijo99,

We seem to have improper bounds set in FME's Mapinfo coordinate system definition for EPSG:3006. The data is being clipped to these bounds when writing to Mapinfo. I have created a problem report for our development team to have this fixed.

The Mapinfo writer allows you to override the default bounds in the Parameters. Please use the projected bounds values provided at https://epsg.io/3006 for the override. This will prevent the clipping.

Aha - I see.

 

Thank you for your help!

 

 


daveatsafe
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  • Best Answer
  • May 1, 2018

Hi @nijo99,

I am happy to announce that we have fixed the problem with the bounds in the Mapinfo coordinate system definitions. This fix is available in the latest beta version of FME 2018.1, which can be downloaded from www.safe.com/beta.


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  • Author
  • 4 replies
  • May 2, 2018

Hi @nijo99,

I am happy to announce that we have fixed the problem with the bounds in the Mapinfo coordinate system definitions. This fix is available in the latest beta version of FME 2018.1, which can be downloaded from www.safe.com/beta.

Great news @DaveAtSafe!

 

Thanks a lot!