Hi,
What exactly is wrong with the builds from http://gisinternals.com/sdk/? I have
been using them for years with good success.
-Jukka Rahkonen-
Jonathan wrote:
Thanks for the replies. My other problem is that I don't have a good GDAL
install (precompiled for windows). Every one I've tried has been
buggy/non-functional in some critical way (typically environmental variable
issues). I tried creating a nice little batch file to do everything at once in
sequence for each raster, but alas that didn't work out so its "do things
manually".
I'll have to do some more testing.
Thanks,
Jonathan
On 22 November 2013 18:58, Even Rouault
<even.roua...@mines-paris.org<mailto:even.roua...@mines-paris.org>> wrote:
Le vendredi 22 novembre 2013 19:18:56, Rahkonen Jukka a écrit :
> Hi,
>
> I think that the reason is that is is hard/impossible to make an optimal
> deflate compressed tiff when gdal_merge goes through the circle "open file
> - add data - close file". There are other alternatives to test: - You can
> use a non-optimal deflate compressed tiff as a temporary file - is is
> lossless and the final result will be identical. - Use gdalbuildvrt for
> making an interim .VRT file and convert that to final product instead of
> using gdal_merge.py. Perhaps GDAL can make an optimal deflate compressed
> image from the VRT file with one run.
>
> A hint: If you play with big datasets and deflate compressed images GDAL
> sometimes does not guess when it should jump into BigTIFF. Give the -co
> bigtiff=yes parameter manually if you feel that it could be needed.
>
> If Even is still sneaking here he can say if the behaviour you see with
> gdal_merge.py is expected or a bug. Otherwise you can ask it from gdal-dev
> mailing list.
I'm not sure which gdal_merge behaviour Jukka is refering too, but indeed it
might not be the appropriate tool to mosaic stuff into a compressed geotiff due
to the way it operates (it can have to do uncompression / recompression cycles
that will waste space in the geotiff). gdalbuildvrt to do the mosaicing
(without a disk footprint of only a few bytes) followed by gdal_translate to
compress will lead to the optimal file size.
>
> -Jukka-
>
> ________________________________
> Jonathan Moules wrote:
>
> On 21 November 2013 21:23, Rahkonen Jukka
> <jukka.rahko...@mmmtike.fi<mailto:jukka.rahko...@mmmtike.fi><mailto:jukka.rahko...@mmmtike.fi<mailto:jukka.rahko...@mmmtike.fi>>>
> wrote: I
> would try if it makes difference to save result from gdal_merge first into
> uncompressed tiff and compress it with deflate in a separate run.
>
>
> Yep, that worked. Although that's unfeasible for the full dataset; I don't
> have enough diskspace for an uncompressed version.
>
> Also, doing that (deflate, level 9), the tiled version was about 15%
> smaller than the untiled version.
>
> Thanks!
> Jonathan
>
>
> Jukka Rahkonen
>
> ________________________________
> Jonathan
> Moules<mailto:jonathanmou...@warwickshire.gov.uk<mailto:jonathanmou...@warwickshire.gov.uk>>
> wrote:
>
> It is not completely surprising. If there are no repeateable patterns in
> the uncompressed stream, deflate can result in (a bit) larger files. You
> might want to try with -co INTERLEAVE=BAND added to see if it improves
> things. But generally DEFLATE is not appropriate for aerial imagery.
>
>
> The "bit" larger files are typically about double the size of the
> uncompressed one!
>
> I know deflate isn't as well suited, but I'm experimenting with a whole
> bunch of different settings to see what sticks.
>
> ======
>
> I'm now trying to get the four band into GeoServer (regular GeoTIFF), but
> it's not having it. I've created it the same way as the 3 band: gdal_merge
> -q -o rgbi.tif -of GTiff -co TILED=YES -co BIGTIFF=YES -co COMPRESS=JPEG
> -co JPEG_QUALITY=25 -co BLOCKXSIZE=512 -co BLOCKYSIZE=512 --optfile
> tiff_list.txt (low compression for testing). No pyramids yet.
>
> The first thing I notice is that the 4 band is *smaller* (118MB) than the 3
> band (164MB).
>
> The gdalinfo for the four band:
>
> Driver: GTiff/GeoTIFF
> Files: rgbi.tif
> Size is 8000, 24000
> Coordinate System is:
> PROJCS["OSGB 1936 / British National Grid",
> [brevity removed]
> Origin = (419000.000000000000000,240000.000000000000000)
> Pixel Size = (0.125000000000000,-0.125000000000000)
> Metadata:
> AREA_OR_POINT=Area
> Image Structure Metadata:
> COMPRESSION=JPEG
> INTERLEAVE=PIXEL
> Corner Coordinates:
> Upper Left ( 419000.000, 240000.000) ( 1d43'22.27"W, 52d 3'27.49"N)
> Lower Left ( 419000.000, 237000.000) ( 1d43'22.87"W, 52d 1'50.38"N)
> Upper Right ( 420000.000, 240000.000) ( 1d42'29.76"W, 52d 3'27.37"N)
> Lower Right ( 420000.000, 237000.000) ( 1d42'30.39"W, 52d 1'50.26"N)
> Center ( 419500.000, 238500.000) ( 1d42'56.32"W, 52d 2'38.88"N)
> Band 1 Block=512x512 Type=Byte, ColorInterp=Red
> Mask Flags: PER_DATASET ALPHA
> Band 2 Block=512x512 Type=Byte, ColorInterp=Green
> Mask Flags: PER_DATASET ALPHA
> Band 3 Block=512x512 Type=Byte, ColorInterp=Blue
> Mask Flags: PER_DATASET ALPHA
> Band 4 Block=512x512 Type=Byte, ColorInterp=Alpha
>
> ----
>
> The GeoServer logs contain an error (WMS GetMap request):
> 2013-11-20 17:56:07,498 ERROR [org.geoserver.ows] -
> java.lang.RuntimeException: javax.imageio.IIOException: Unsupported Image
> Type at
> com.sun.media.jai.imageioimpl.ImageReadOpImage.computeTile(ImageReadOpImag
> e.java:706) at
> com.sun.media.jai.util.SunTileScheduler.scheduleTile(SunTileScheduler.java
> :904) at javax.media.jai.OpImage.getTile(OpImage.java:1129)
> ....
> Caused by: javax.imageio.IIOException: Unsupported Image Type
> at com.sun.imageio.plugins.jpeg.JPEGImageReader.readInternal(Unknown
> Source) at com.sun.imageio.plugins.jpeg.JPEGImageReader.read(Unknown
> Source) at
> it.geosolutions.imageioimpl.plugins.tiff.TIFFJPEGDecompressor.decodeRaw(TI
> FFJPEGDecompressor.java:278)
>
>
> Ideally I'm looking to have one source file which can be symbolised as not
> just RGB, but also as any number of false-colour possibilities.
>
> Any suggestions anyone? I'm stumbling into new (for me) territory here.
>
> Thanks,
> Jonathan
>
> This transmission is intended for the named addressee(s) only and may
> contain sensitive or protectively marked material up to RESTRICTED and
> should be handled accordingly. Unless you are the named addressee (or
> authorised to receive it for the addressee) you may not copy or use it, or
> disclose it to anyone else. If you have received this transmission in
> error please notify the sender immediately. All email traffic sent to or
> from us, including without limitation all GCSX traffic, may be subject to
> recording and/or monitoring in accordance with relevant legislation.
>
> ---------------------------------------------------------------------------
> --- Shape the Mobile Experience: Free Subscription
> Software experts and developers: Be at the forefront of tech innovation.
> Intel(R) Software Adrenaline delivers strategic insight and game-changing
> conversations that shape the rapidly evolving mobile landscape. Sign up
> now.
> http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktr
> k _______________________________________________
> Geoserver-users mailing list
> Geoserver-users@lists.sourceforge.net<mailto:Geoserver-users@lists.sourceforge.net><mailto:Geoserver-users@lists.sourcefo<mailto:Geoserver-users@lists.sourcefo>
> rge.net<http://rge.net>>
> https://lists.sourceforge.net/lists/listinfo/geoserver-users
>
>
>
> This transmission is intended for the named addressee(s) only and may
> contain sensitive or protectively marked material up to RESTRICTED and
> should be handled accordingly. Unless you are the named addressee (or
> authorised to receive it for the addressee) you may not copy or use it, or
> disclose it to anyone else. If you have received this transmission in
> error please notify the sender immediately. All email traffic sent to or
> from us, including without limitation all GCSX traffic, may be subject to
> recording and/or monitoring in accordance with relevant legislation.
>
> ---------------------------------------------------------------------------
> --- Shape the Mobile Experience: Free Subscription
> Software experts and developers: Be at the forefront of tech innovation.
> Intel(R) Software Adrenaline delivers strategic insight and game-changing
> conversations that shape the rapidly evolving mobile landscape. Sign up
> now.
> http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktr
> k _______________________________________________
> Geoserver-users mailing list
> Geoserver-users@lists.sourceforge.net<mailto:Geoserver-users@lists.sourceforge.net>
> https://lists.sourceforge.net/lists/listinfo/geoserver-users
--
Geospatial professional services
http://even.rouault.free.fr/services.html
------------------------------------------------------------------------------
Shape the Mobile Experience: Free Subscription
Software experts and developers: Be at the forefront of tech innovation.
Intel(R) Software Adrenaline delivers strategic insight and game-changing
conversations that shape the rapidly evolving mobile landscape. Sign up now.
http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk
_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net<mailto:Geoserver-users@lists.sourceforge.net>
https://lists.sourceforge.net/lists/listinfo/geoserver-users
This transmission is intended for the named addressee(s) only and may contain
sensitive or protectively marked material up to RESTRICTED and should be
handled accordingly. Unless you are the named addressee (or authorised to
receive it for the addressee) you may not copy or use it, or disclose it to
anyone else. If you have received this transmission in error please notify the
sender immediately. All email traffic sent to or from us, including without
limitation all GCSX traffic, may be subject to recording and/or monitoring in
accordance with relevant legislation.
------------------------------------------------------------------------------
Shape the Mobile Experience: Free Subscription
Software experts and developers: Be at the forefront of tech innovation.
Intel(R) Software Adrenaline delivers strategic insight and game-changing
conversations that shape the rapidly evolving mobile landscape. Sign up now.
http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk
_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users
