Hi,
I like your approach. Although one problem from my end is how to manage the
datasets when we get new photos. I guess the whole process will have to be done
again from step one!
If I keep the photos as single files, I would then be able to just replace the
old photos and recreate the new image mosaic.
OR
create a number of imagemosaic e.g for each Region (we have 5) and then serve
the 5 regions together in a grouped layer.
It´s hard to tell which is easier....Orthophoto management is a real pain!
yours,
Robert
________________________________
Von: "[email protected]" <[email protected]>
An: Robert Buckley <[email protected]>
Cc: "[email protected]"
<[email protected]>
Gesendet: 11:18 Montag, 30.Januar 2012
Betreff: Re: [Geoserver-users] How to best serve Orthophotos with geoserver?
Hi Robert, answers inside
Zitat von Robert Buckley <[email protected]>:
> Hi,
>
> I would like to serve all by Orthophotos with geoserver and then cache them
> with GeoWebCache.
>
> Each Photo is a 3 band 8 bit raster with a 40cm resolution at around 74mb
> each.
>
> - Is there any benefit to reducing the bands from 3 to 1? ( the size of the
> raster remains the same)
The pixel dimensions remain the same, but one pixel is represented by one byte
instead of three bytes. The answers is definitely YES.
>
> - Is there any way I can reduce the size from 75mb? I have around 1300
> Photos and it would be nice to lower the upload time...
I have the same problem here and thinking about the following solution.
use gdal_merge.py or gdalwarp to create one big picture having 3 bands
use rgb2pct.py to create a big picture having one band.
use gdal_translate to create a geotiff (using inner tiles and LZW compression).
use gdaladdo to create the the overviews you need
The result should be one geotiff file (Probably a bigtiff if the size is bigger
than 4GB).
Geoserver supports geotiff out of the box. Geoserver 2.2.x supports bigtiff,
Geoserver 2.1.x supports it recently.
http://jira.codehaus.org/browse/GEOT-3931
If you are on 2.1.x and you need bigtiff support, you have to test with a
nightly build.
Hope this helps
Christian
>
> thanks for your suggestions,
>
> Rob
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