topic Re: Export/Extract Rasters From Geodatabse in Data Management Questions

Export/Extract Rasters From Geodatabse

MarkYoung — Thu, 07 Jul 2011 12:09:45 GMT

Hi,
Is it possible to export rasters from a geodatabase to image files (their original state)
Thanks
Mark

Re: Export/Extract Rasters From Geodatabse

VinceAngelo — Thu, 07 Jul 2011 13:30:36 GMT

Sure, provided that:
1) It's not an unmanaged raster catalog (in which case the source rasters still exist as is),
2) The source hasn't been mosaicked into the geodatabase (in which case you'd need to
know the source bounds to clip it back out again)
3) A lossy compression algorithm hasn't been used (only LZ77 is lossless)
4) Some other process hasn't been run which changed the source data (reclassification,
pixeltype expansion, etc)
5) Your export client (usually ArcGIS) supports export to the original format

- V

Re: Export/Extract Rasters From Geodatabse

MarkYoung — Thu, 07 Jul 2011 13:34:13 GMT

Hi,
Rasters have been mosaicked.. Only reason I ask is that I have a lot of scans and I trimmed them up in Photoshop before loading them into the geodatabase. Looks like I will have to re trim the originals then re-load to the database
Thanks anyways,
Mark

Re: Export/Extract Rasters From Geodatabse

VinceAngelo — Thu, 07 Jul 2011 13:49:17 GMT

I'm not familiar with the details, but if you have ArcGIS Server Image extension (ne Image Server),
you can leave the image marginalia intact and construct a mosaic on the fly from the base images.
It might be less work than starting over with a lossy process, but you'd need an evaluation license
for the Image extension (to start).

- V