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How correctly use the clipper with WMS ?

  • September 25, 2020
  • 4 replies
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Hello,

 

I have a wms that I'm clipping with a polygon bounding geometry. It work but the problem is that FME don't refresh the maps to the level of zooming of my bounding geometry. So It cut the whole planisphere and I have only one giant pixel as result of clipping ... how can I do to have a a detailed map ? Here is url if you want to test : http://ows.terrestris.de/osm/service

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Best answer by redgeographics

When you use a regular WMS reader and a Clipper the Clipper will only work with the data as it's coming out of the WMS. It will not resample/re-read the data.

Instead you can use a FeatureReader to read the WMS, using your polygon as the initiator feature. That way it will use the extents of the polygon as a spatial filter on the WMS.

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4 replies

redgeographics
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  • 3699 replies
  • Best Answer
  • September 25, 2020

When you use a regular WMS reader and a Clipper the Clipper will only work with the data as it's coming out of the WMS. It will not resample/re-read the data.

Instead you can use a FeatureReader to read the WMS, using your polygon as the initiator feature. That way it will use the extents of the polygon as a spatial filter on the WMS.


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  • Author
  • 19 replies
  • September 29, 2020

Great ! It work well, I did not know this way of proceeding, thank you !


redgeographics
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  • Celebrity
  • 3699 replies
  • September 29, 2020

Great ! It work well, I did not know this way of proceeding, thank you !

You're welcome!


deanhowell
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  • 315 replies
  • May 20, 2022

Great ! It work well, I did not know this way of proceeding, thank you !

Any chance you can include a snapshot of the result please?