Jukka, Thanks for your suggestion. We have a couple of requirements
mapserver is only one, the other is some additional processing, but I
like the simplicity of your suggestion.
Brian C. spend a lot of time on irc with me and I think we finally got
the processing chain straightened out and it looks like:
# first preclip any collar (probably not needed)
nearblack -co TILED=YES -of GTiff -nb 0 -near 0 -setmask -q -o tmpfile1
filepath
gdalwarp -t_srs EPSG:4326 -dstalpha -co TILED=YES tmpfile1 tmpfile2
gdal_translate -co TILED=YES -co JPEG_QUALITY=90 -co COMPRESS=JPEG -co
PHOTOMETRIC=YCBCR -b 1 -b 2 -b 3 -mask 4 --config
GDAL_TIFF_INTERNAL_MASK YES tmpfile2 target
gdaladdo -clean -r bilinear target 2 4 8 16 32 64 128
This is pretty fast taking about 9-10 sec per doqq to process.
Thank you for all the suggestions and help.
-Steve
On 2/13/2017 5:02 AM, jratike80 wrote:
Stephen Woodbridge wrote
Even,
Thanks for the quick feedback. I'll will give these suggestions and try
today and let you know how it goes.
Thanks,
-Steve
Hi Steve,
They are probably good suggestions but folks did not bother to think what is
your ultimate target. It is not to improve you commands and hide the black
pixels but simply to make a jpeg-in-tiff compressed mosaic without seams for
Mapserver, perhaps following some other route if it is easier.
So, my suggestion is:
1) Skip gdalwarp
2) Compress your images in native projection
3) Create jpeg compressed overviews
4) Create tileindex and utilize the super powerful "Tileindexes with tiles
in different projections" feature
http://www.mapserver.org/optimization/tileindex.html
You did not mention if your DOQQs come in several different projections but
I suppose that they do. Otherwise there is even less point to use gdalwarp,
Mapserver is so fast with on-the-fly re-projecting.
-Jukka Rahkonen-
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