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Question

Error translation when reading in ecw file with search envelope for level 0-2


joy
Enthusiast
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  • Enthusiast

hi Everyone,

This is a very specific error and I wondering whether it's a bug. Initially I tried using the FeatureReader with Spatial Filter, however then the whole ecw file needs to be read (14 gB) which takes a long time. I then tried using the normal ecw reader with the search envelope which doesn't need to read the whole ecw file before conducting a spatial operation. This works superfast for when I choose a number for Advanced > Pyramid level to Read from 3 to 10. I get the following output for level 3, however the picture is quite coarse as you can see. I would like to have the most sharp picture, thus ideally I would like to choose level 0, however when I choose a number from 0-2 then I get an error translation with no explaination about the cause of the error. I was wondering whether this a bug.

 

afbeelding

4 replies

virtualcitymatt
Celebrity
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how long does it take to fail. A fail with no error message can indicate a resource issue/limit. What does the task manager look like when trying to read the data?

 

Certainly seems weird though if the feature reader can read the whole dataset but that the normal reader would fail like this.


kailinatsafe
Safer
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virtualcitymatt wrote:

how long does it take to fail. A fail with no error message can indicate a resource issue/limit. What does the task manager look like when trying to read the data?

 

Certainly seems weird though if the feature reader can read the whole dataset but that the normal reader would fail like this.

Hello @joy​, pyramids are just downsampled (lower resolution) versions of a raster, so what you're seeing could make sense for level 3. However, @virtualcitymatt​ is correct, both readers in FME Form should be able to read your ECW file (with or without a spatial/pyramid filter)!

It may be helpful if you're able to share the problematic ECW file or a subset for testing (that ideally demonstrates the same issue). If you're unable to share data publically, please consider submitting a support case with us! Happy to help, Kailin.


joy
Enthusiast
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  • Author
  • Enthusiast
  • June 20, 2023
kailinatsafe wrote:

Hello @joy​, pyramids are just downsampled (lower resolution) versions of a raster, so what you're seeing could make sense for level 3. However, @virtualcitymatt​ is correct, both readers in FME Form should be able to read your ECW file (with or without a spatial/pyramid filter)!

It may be helpful if you're able to share the problematic ECW file or a subset for testing (that ideally demonstrates the same issue). If you're unable to share data publically, please consider submitting a support case with us! Happy to help, Kailin.

hello @kailinatsafe​, I am not able to share the ecw file, since my ecw file is bigger than 40 mb and thus can't be uploaded via submitting a support case. Is there another way possible to send files that are bigger than 40mb?


kailinatsafe
Safer
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kailinatsafe wrote:

Hello @joy​, pyramids are just downsampled (lower resolution) versions of a raster, so what you're seeing could make sense for level 3. However, @virtualcitymatt​ is correct, both readers in FME Form should be able to read your ECW file (with or without a spatial/pyramid filter)!

It may be helpful if you're able to share the problematic ECW file or a subset for testing (that ideally demonstrates the same issue). If you're unable to share data publically, please consider submitting a support case with us! Happy to help, Kailin.

Yes @joy​, we can follow up in a support case and you can upload to Safe's FTP site! Thank you! Kailin.


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