Btw, while FME writes data to jpeg2000 format I got error called ECW Exception ("If you receive this message, pelase report it at  "hhtp://www.ermapper.com/support/supportform/ ..etc..).

 

I repeated It few times and each time error appeared at line:

"JPEG2000 writer: Compleated 28.94% of intermediate processing"

 

Does anyone know this kind of problem?

 

 

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That's a good question about compression. I didn't know the difference so I asked our raster developer.

 

 

If you set the compression to 0 then you will get a lossless compression. It won't be compressed much, but it will be less than a raw image.

 

 

Otherwise the compression is lossy. Our developer says "basically you have to throw away some information, and what that is depends on the compression method".

 

 

For jpeg2000 it's a Wavelet Compression, which is quite different to just a reduction in resolution. In fact it looks quite complicated to me.

 

 

Resampling is much more simpler to understand. I guess that makes me think it will be less efficient, but I can't say for sure.

 

 

As for the error message, can you submit this as a support case? I know it says to contact ermapper.com but I think we should at least look at it first.

 

 

Regards

 

 

Mark

 

 

Mark Ireland

 

Product Evangelist

 

Safe Software Inc

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Ok Mark, I submited this case to support and hope they can help me somehow! Thank you.

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