What is good to export an image from large file size to reduce ? I have two images that are really huge and it can use up space...
Thanks for the information..
I'm curious ... Is it okay if I re-export to TIFF from ECW to preseve the ratio or is it going to revert to large file size ?
The image is going to revert to it’s large file size if you convert from ECW format back to TIFF. If you really want to use the TIFF format you could use LZW or PackBits compression, but neither of these compression methods will come anywhere close to ECW.
If you want a lossless compression JPEG 2000 is a good robust technique to use. It also supports lossy if that's the way you want to go.
I was able to do export a hillshade into ECW ; however in ArcGIS arcatalog showed me there is two subfiles that it came with it
AllOpacity and Grayscale . The AllOpacity showed me light blue color but the Grayscale looks fine.
Is there a way around to turn the AllOpacity off ?