Hi,
I would like to add also that with paletted images no other resampling method
than ”nearest” makes sense. Try if removing “–r average” helps.
The safe way is to expand the paletted images into RGB(A) with the pct2pgb
utility but the price is increased need for disk space.
-Jukka Rahkonen-
Lähettäjä: Daniele Romagnoli [mailto:daniele.romagn...@geo-solutions.it]
Lähetetty: 8. maaliskuuta 2018 16:17
Vastaanottaja: rich...@duif.net
Kopio: geoserver-devel <geoserver-devel@lists.sourceforge.net>
Aihe: Re: [Geoserver-devel] Geotiff: pyramids non transparant while original is
transparent
Hi Richard,
I think that the problem is in how GDAL produces overviews with palettes:
https://lists.osgeo.org/pipermail/gdal-dev/2016-November/045589.html
The different behavior between QGIS and GeoServer is due to this:
QGIS (based on GDAL) uses the palette of the main image whilst some other
readers, as an instance, the JAVA TiffReader used by GeoServer, uses overview's
specific palette.
I'm also going to ask if there is any news on that on GDAL.
Hope this helps.
Regards,
Daniele
As further references:
------------------------------
https://trac.osgeo.org/gdal/ticket/2213
https://lists.osgeo.org/pipermail/gdal-dev/2016-November/045590.html
https://github.com/geosolutions-it/imageio-ext/issues/122
On Thu, Mar 8, 2018 at 2:37 PM, Richard Duivenvoorde
<rdmaili...@duif.net<mailto:rdmaili...@duif.net>> wrote:
Hi All,
We have some Geotiff rasters with small lines (cables) on it.
Serving these transparent with Geoserver is fine, using
InputTransparentColor set to #ffffff.
But adding pyramids/overviews to it, the lines look better in QGIS, so
we added the pyramids using gdaladdo.
While that works for QGIS, for Geoserver (2.12.0) it looks as if the
InputTransparentColor in the overviews is NOT used?
The map is not transparent anymore, untill you zoom in at the base
level, THEN the map will be transparent again.
Using default raster sld.
Anybody a clue?
Regards,
Richard Duivenvoorde
PS:
Gdalinfo for the original tiff (without pyramids):
Driver: GTiff/GeoTIFF
Files: WATER.tif
Size is 13422, 20898
Coordinate System is:
PROJCS["Amersfoort / RD New",
GEOGCS["Amersfoort",
DATUM["Amersfoort",
SPHEROID["Bessel 1841",6377397.155,299.1528128,
AUTHORITY["EPSG","7004"]],
TOWGS84[565.2369,50.0087,465.658,-0.406857,0.350733,-1.87035,4.0812],
AUTHORITY["EPSG","6289"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4289"]],
PROJECTION["Oblique_Stereographic"],
PARAMETER["latitude_of_origin",52.15616055555555],
PARAMETER["central_meridian",5.38763888888889],
PARAMETER["scale_factor",0.9999079],
PARAMETER["false_easting",155000],
PARAMETER["false_northing",463000],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AXIS["X",EAST],
AXIS["Y",NORTH],
AUTHORITY["EPSG","28992"]]
Origin = (132801.000000000000000,452878.000000000000000)
Pixel Size = (0.333333300000000,-0.333333300000000)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
COMPRESSION=LZW
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( 132801.000, 452878.000) ( 5d 3'49.93"E, 52d 3'53.02"N)
Lower Left ( 132801.000, 445912.001) ( 5d 3'51.56"E, 52d 0' 7.60"N)
Upper Right ( 137275.000, 452878.000) ( 5d 7'44.84"E, 52d 3'53.60"N)
Lower Right ( 137275.000, 445912.001) ( 5d 7'46.14"E, 52d 0' 8.18"N)
Center ( 135038.000, 449395.000) ( 5d 5'48.11"E, 52d 2' 0.62"N)
Band 1 Block=13422x1 Type=Byte, ColorInterp=Palette
NoData Value=0
Color Table (RGB with 256 entries)
0: 255,255,255,0
1: 0,0,255,255
2: 0,0,0,255
3: 0,0,0,255
4: 0,0,0,255
5: 0,0,0,255
6: 0,0,0,255
7: 0,0,0,255
8: 0,0,0,255
9: 0,0,0,255
10: 0,0,0,255
etc....
Gdalinfo for the tiff with pyramids:
Driver: GTiff/GeoTIFF
Files: WATER.tif
Size is 13422, 20898
Coordinate System is:
PROJCS["Amersfoort / RD New",
GEOGCS["Amersfoort",
DATUM["Amersfoort",
SPHEROID["Bessel 1841",6377397.155,299.1528128,
AUTHORITY["EPSG","7004"]],
TOWGS84[565.2369,50.0087,465.658,-0.406857,0.350733,-1.87035,4.0812],
AUTHORITY["EPSG","6289"]],
PRIMEM["Greenwich",0,
AUTHORITY["EPSG","8901"]],
UNIT["degree",0.0174532925199433,
AUTHORITY["EPSG","9122"]],
AUTHORITY["EPSG","4289"]],
PROJECTION["Oblique_Stereographic"],
PARAMETER["latitude_of_origin",52.15616055555555],
PARAMETER["central_meridian",5.38763888888889],
PARAMETER["scale_factor",0.9999079],
PARAMETER["false_easting",155000],
PARAMETER["false_northing",463000],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]],
AXIS["X",EAST],
AXIS["Y",NORTH],
AUTHORITY["EPSG","28992"]]
Origin = (132801.000000000000000,452878.000000000000000)
Pixel Size = (0.333333300000000,-0.333333300000000)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
COMPRESSION=LZW
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( 132801.000, 452878.000) ( 5d 3'49.93"E, 52d 3'53.02"N)
Lower Left ( 132801.000, 445912.001) ( 5d 3'51.56"E, 52d 0' 7.60"N)
Upper Right ( 137275.000, 452878.000) ( 5d 7'44.84"E, 52d 3'53.60"N)
Lower Right ( 137275.000, 445912.001) ( 5d 7'46.14"E, 52d 0' 8.18"N)
Center ( 135038.000, 449395.000) ( 5d 5'48.11"E, 52d 2' 0.62"N)
Band 1 Block=13422x1 Type=Byte, ColorInterp=Palette
NoData Value=0
Overviews: 6711x10449, 3356x5225, 1678x2613, 839x1307, 420x654,
210x327, 105x164, 53x82
Color Table (RGB with 256 entries)
0: 255,255,255,0
1: 0,0,255,255
2: 0,0,0,255
3: 0,0,0,255
4: 0,0,0,255
5: 0,0,0,255
6: 0,0,0,255
7: 0,0,0,255
8: 0,0,0,255
9: 0,0,0,255
10: 0,0,0,255
etc...
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Regards,
Daniele Romagnoli
==
GeoServer Professional Services from the experts! Visit http://goo.gl/it488V
for more information.
==
Ing. Daniele Romagnoli
Senior Software Engineer
GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
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