Caio Simone,
Here is the output of gdalinfo and I suppose that explains where the
blue color comes from since the color map defines 0 as exactly that
shade of blue.
Based on your comments and that colormap I set the BackgroundValues to
255 and both InputTransparentColor and OutputTransparentColor to
#000000. Now everything works wonderfully. I suppose I should have
studied that gdalinfo dump a little closer!
Thanks for the help.
Mark
Driver: GTiff/GeoTIFF
Files: ***.tif
Size is 2168, 2208
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.257223563,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
Origin = (-97.277345999999994,49.416856000000003)
Pixel Size = (0.003600000000000,-0.002700000000000)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=BAND
Corner Coordinates:
Upper Left ( -97.2773460, 49.4168560) ( 97d16'38.45"W, 49d25'0.68"N)
Lower Left ( -97.2773460, 43.4552560) ( 97d16'38.45"W, 43d27'18.92"N)
Upper Right ( -89.4725460, 49.4168560) ( 89d28'21.17"W, 49d25'0.68"N)
Lower Right ( -89.4725460, 43.4552560) ( 89d28'21.17"W, 43d27'18.92"N)
Center ( -93.3749460, 46.4360560) ( 93d22'29.81"W, 46d26'9.80"N)
Band 1 Block=2168x3 Type=Byte, ColorInterp=Palette
Color Table (RGB with 256 entries)
0: 7,23,178,255
1: 247,245,245,255
2: 124,137,224,255
3: 245,237,226,255
... snip ...
214: 21,47,9,255
215: 51,17,66,255
216: 0,0,0,255
217: 0,0,0,255
218: 0,0,0,255
... snip ...
253: 0,0,0,255
254: 0,0,0,255
255: 0,0,0,255
On Tue, Jun 4, 2013 at 6:38 AM, Simone Giannecchini
<[email protected]> wrote:
> Ciao Mark,
> please, read below...
>
> Regards,
> Simone Giannecchini
> ==
> GeoServer training in Milan, 6th & 7th June 2013! Visit
> http://geoserver.geo-solutions.it for more information.
> ==
>
> Ing. Simone Giannecchini
> @simogeo
> Founder/Director
>
> GeoSolutions S.A.S.
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
> phone: +39 0584 962313
> fax: +39 0584 1660272
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>
> http://www.geo-solutions.it
> http://twitter.com/geosolutions_it
>
> -------------------------------------------------------
>
>
> On Mon, Jun 3, 2013 at 9:37 PM, Mark <[email protected]> wrote:
>> Hello,
>>
>> I have a number of geotiff files that I'm attempting to mosaic and use
>> as an overlay on top of a base map. My problem is that I can't get rid
>> of the a border on the boundary of the geotiff mosaic. I've set
>> BackgroundValues to -9999 and the OutputTransparentColor to 000000
>> which takes care of most of the area not occupied by images.
>
> Can you paster here the output of the gdalinfo tool on one of these images?
>
> Rationale. If your geotiff are RGB and they contain black portions we
> can use the InputTransparentColor to remove such areas.
> If the overall mosaic has holes (portions not covered by data) I would
> suggest to set the BackgroundValues to 0 and leave the
> OutputTransparentColor to 000000.
> This is a two steps approach:
> -1- use InputTransparentColor to remove blackportions within the images
> -2- use BackgroundValues to ask for a black background
> -3- use OutputTransparentColor to make the background go away
>
> ok, that was 3 steps, but I guess you got the idea :)
>
>>
>> The border seems to occur at almost all edges. For instance, I've
>> attached an image of the open layers preview for the west coast of the
>> US. (The actual image data is removed and replaced with a gray field.)
>> There are three tiles present in this portion of the mosaic, I'm
>> attempting to get rid of the blue border. The white area to the left
>> is what I want, transparent tiles. This blue border changes width
>> depending on the zoom level and the suggested_tile_size setting. The
>> bigger the tile size the wider the border.
>>
>
> Thinking, this is actually strange. If you configure the geotiff as a
> single geotiff store does it look differently?
> Which version of GeoServer are you working with?
>
>
>> The border isn't part of the geotiffs, I've checked, and I have no
>> idea why it is blue. I can try to make the border insubstantial by
>> changing the suggested_tile_size to something insanely small, but that
>> isn't an acceptable solution (it is already 32,32 in the attached
>> image)
>
> K, this answer partially to my question above, however the gdalinfo
> would be very useful anyway.
> It would be probably also good to have access to a couple of samples
> to reproduce the issue. You can
> send them privately if you wish.
>
>>
>> Any suggestions?
>>
>> Thanks,
>>
>> Mark
>>
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