On Tue, Nov 12, 2013 at 9:27 AM, Jonathan Moules <
jonathanmou...@warwickshire.gov.uk> wrote:
> Hi List,
> We've recently taken deliver of some aerial photography.
>
> As lossless GeoTIFFs, the RedGreenBlue data is *278GB*
> As a compressed JP2 file the data is *26GB* - the JP2 is almost as good
> as the GeoTIFFs and comes with pyramids built in.
>
> But for speed purposes with GeoServer I've created an imageMosaic of 13
> Jpeg compressed GeoTIFFs with overviews/tiles etc. This comes out at a
> massive *106GB* and the quality is worse than the JP2 file despite being
> four times the size.
>
Try something like this instead:
gdal_translate out.tiff in.tiff -co TILED=YES -co blockxsize=512 -co
blockysize=512 -co COMPRESS=JPEG -co JPEG_QUALITY=85 -co PHOTOMETRIC=YCBCR
gdaladdo out.tiff -r average --config COMPRESS_OVERVIEW JPEG --config
JPEG_QUALITY_OVERVIEW 85 --config INTERLEAVE_OVERVIEW PIXEL --config
PHOTOMETRIC_OVERVIEW YCBCR 2 4 8 16 32
Should give you much better quality, and still, a relatively low size (not
as small as JP2, but faster)
Cheres
Andrea
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