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Raster mosaic

  • March 16, 2018
  • 3 replies
  • 123 views
M
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Hello,

 

I have multiple ECW files and I want to make one raster made of all those images. Those imagery that I have are 16-bit and 4 band. I would need my result to be in 3 band and 8-bit and I would like to write it in BigTIFF format. I am not currently doing this project, I will need to finish this in few days and I was wondering if it is possible in FME.

I found this article and this one and I am not sure how to finish all these things in FME and if it is even possible.

 

 

Thank you all in advance for every kind of help.

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3 replies

redgeographics
Celebrity
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  • redgeographicsCelebrity
  • Celebrity
  • 3703 replies
  • March 16, 2018

Yes, it's possible.

One ECW reader to read all your ECW's (you can set that to read all ECW's in a single folder), then a RasterInterpretationCoercer to set them to RGB24 and a RasterMosaicker to mosaic them. Write out to a GeoTiff writer and you're done. Do make sure to check the parameters on the output feature type, that's where you specify the BigTIFF support and I think it defaults to no.

I'm using a GeoTiff reader as input because I don't have ECW's on this machine but the process remains the same.

And this is where you'll find that BigTIFF setting.

FME rocks! \m/
M
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  • maliodpalube
  • Author
  • 63 replies
  • March 19, 2018

Yes, it's possible.

One ECW reader to read all your ECW's (you can set that to read all ECW's in a single folder), then a RasterInterpretationCoercer to set them to RGB24 and a RasterMosaicker to mosaic them. Write out to a GeoTiff writer and you're done. Do make sure to check the parameters on the output feature type, that's where you specify the BigTIFF support and I think it defaults to no.

I'm using a GeoTiff reader as input because I don't have ECW's on this machine but the process remains the same.

And this is where you'll find that BigTIFF setting.

Thank You a lot. I just need to ask more, if You know, is there a limit on how many ECW files can I mosaic? Because I will work with 100+. Thank You once more.

 

 

redgeographics
Celebrity
Forum|alt.badge.img+60
  • redgeographicsCelebrity
  • Celebrity
  • 3703 replies
  • March 19, 2018
Thank You a lot. I just need to ask more, if You know, is there a limit on how many ECW files can I mosaic? Because I will work with 100+. Thank You once more.

 

 

It's hard to say from the outside. The number and size of ECW's is a factor, as well as the amount of RAM and temp disk space you have available. You'll have to try it and see what happens.

 

 

FME rocks! \m/

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