Simone.
-------------------------------------------------------
Ing. Simone Giannecchini
GeoSolutions S.A.S.
Owner - Software Engineer
Via Carignoni 51
55041 Camaiore (LU)
Italy
On Thu, Dec 4, 2008 at 4:31 PM, Aaron Sutula <Aaron.Sutula@anonymised.com> wrote:
This is also similar to the behavior I have posted on the list before:
Hi List,
I'm fairly new to Geoserver, and I'm very impressed by how easy it is to
get up and running quickly.
I've been playing with serving data from Geoserver's WMS. I'm using the
stand alone Geoserver 1.7.0-RC4 on linux with jdk 1.6.0_06 and native jai.
I've been noticing some strange image rendering behavior when generating
WMS images of radar data. This data contains many polygons (~80,000) and
is in a custom orthographic projection. The polygons near the center of
the data are much smaller than the ones near the perimeter (since it is
radial data).
Many of the small polygons are not rendered or are rendered in a way
that leaves a strange pattern. You can see this in
http://venus1.wrh.noaa.gov/scratch/sutula/wms1.png. That image was
generated with the following WMS request:
http://localhost:8080/geoserver/wms?WIDTH=800&HEIGHT=740&LAYERS=topp:states,topp%3ABRO_20080723_1807&STYLES=&SRS=EPSG%3A500001&FORMAT=image%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&FORMAT_OPTIONS=antialias%3Anone&BBOX=-268876.70491178706,-160532.58400467926,134399.955480083,212498.32685780057
Strangely, if I make the output image half the size, the data does not
appear at all as seen in
http://venus1.wrh.noaa.gov/scratch/sutula/wms2.png. That was generated with:
http://localhost:8080/geoserver/wms?WIDTH=400&HEIGHT=370&LAYERS=topp:states,topp%3ABRO_20080723_1807&STYLES=&SRS=EPSG%3A500001&FORMAT=image%2Fpng&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&FORMAT_OPTIONS=antialias%3Anone&BBOX=-268876.70491178706,-160532.58400467926,134399.955480083,212498.32685780057
My sld has no scale dependence and only specifies a fill color and
opacity for different values. The behavior happens with or without anti
aliasing enabled.
Any ideas what is going on here?
Thank you,
Aaron
In summary, the data does not render at all when you zoom out a bit, and
when it does render, some pixels are not filled in where the features being
rendered are relatively small. I see the same behavior in Udig, but the data
renders correctly in other software like Mapserver. It would be wonderful to
get this fixed.
Aaron
Simone Giannecchini wrote:
That's exactly the erroneous behavior I have fixed in the SUN tiff reader.
Simone.
-------------------------------------------------------
Ing. Simone Giannecchini
GeoSolutions S.A.S.
Owner - Software Engineer
Via Carignoni 51
55041 Camaiore (LU)
Italy
phone: +39 0584983027
fax: +39 0584983027
mob: +39 333 8128928
http://www.geo-solutions.it
http://simboss.blogspot.com/
http://www.linkedin.com/in/simonegiannecchini
-------------------------------------------------------
On Thu, Dec 4, 2008 at 3:28 PM, Brian Walawender
<Brian.Walawender@anonymised.com> wrote:
Simone and Daniele,
One more comment, it looks like the geotiff values are being truncated to
integers at the initial zooms and then being displayed as a float once you
zoom in.
bw
-----Original Message-----
From: Simone Giannecchini [mailto:simone.giannecchini@anonymised.com]
Sent: Wednesday, December 03, 2008 6:01 PM
To: Brian.Walawender@anonymised.com
Cc: geoserver-users@lists.sourceforge.net
Subject: Re: [Geoserver-users] Raster/WMS Display Issue
Ciao Brian,
I am pretty sure you have run into a JAI-ImageIO tiff bug (actually a
combination of two bugs) as I reported a while back. As Daniele
mentioned, it would be great to get some sample data to make sure it
is not a bug somewhere in geotools. I guess it is time to push out an
imageio-ext release and to include the improved imageio-tiff
reader/writer, what do you think daniele?
Simone.
-------------------------------------------------------
Ing. Simone Giannecchini
GeoSolutions S.A.S.
Owner - Software Engineer
Via Carignoni 51
55041 Camaiore (LU)
Italy
phone: +39 0584983027
fax: +39 0584983027
mob: +39 333 8128928
http://www.geo-solutions.it
http://simboss.blogspot.com/
http://www.linkedin.com/in/simonegiannecchini
-------------------------------------------------------
On Wed, Dec 3, 2008 at 9:35 PM, Brian Walawender
<Brian.Walawender@anonymised.com> wrote:
Hello,
I have a 16 MB Geotiff that I am serving up as a WMS feed on Geoserver
1.7.0. I can only get the raster to display after I zoom in to a 1:6
scale. Well it actually displays prior to that but only values greater
than one inch (everything else is blank). It seems to be an intermittent
problem (the raster is recreated every 20 minutes).
The details on the raster are:
Driver: GTiff/GeoTIFF
Files: rain.tif
Size is 5000, 5000
Coordinate System is:
GEOGCS["WGS 84",
DATUM["WGS_1984",
SPHEROID["WGS 84",6378137,298.2572235629972,
AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4326"]]
Origin = (-126.000000000000000,22.000000000000000)
Pixel Size = (0.012400000000000,0.005600000000000)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
COMPRESSION=LZW
INTERLEAVE=BAND
Corner Coordinates:
Upper Left (-126.0000000, 22.0000000) (126d 0'0.00"W, 22d 0'0.00"N)
Lower Left (-126.0000000, 50.0000000) (126d 0'0.00"W, 50d 0'0.00"N)
Upper Right ( -64.0000000, 22.0000000) ( 64d 0'0.00"W, 22d 0'0.00"N)
Lower Right ( -64.0000000, 50.0000000) ( 64d 0'0.00"W, 50d 0'0.00"N)
Center ( -95.0000000, 36.0000000) ( 95d 0'0.00"W, 36d 0'0.00"N)
Band 1 Block=256x256 Type=Float32, ColorInterp=Gray
Computed Min/Max=0.000,2.482
Minimum=0.000, Maximum=2.482, Mean=0.009, StdDev=0.045
Metadata:
STATISTICS_MINIMUM=0
STATISTICS_MAXIMUM=2.4823353290558
STATISTICS_MEAN=0.0089933774132436
STATISTICS_STDDEV=0.044540742213422
The raster style is:
<?xml version="1.0" encoding="ISO-8859-1"?>
<StyledLayerDescriptor version="1.0.0"
xsi:schemaLocation="http://www.opengis.net/sld
StyledLayerDescriptor.xsd"
xmlns="http://www.opengis.net/sld"
xmlns:ogc="http://www.opengis.net/ogc"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<!-- a named layer is the basic building block of an sld document -->
<NamedLayer>
<Name>precip_raster</Name>
<UserStyle>
<!-- they have names, titles and abstracts -->
<Title>Precip Raster Colormap</Title>
<Abstract>Colors for precipitation raster image</Abstract>
<FeatureTypeStyle>
<Rule>
<RasterSymbolizer>
<Opacity>1.0</Opacity>
<ColorMap type="Intervals">
<ColorMapEntry color="#FFFFFF"
quantity="0.00" opacity="0.0" />
<ColorMapEntry color="#FFFFFF"
quantity="0.0099" opacity="0.0" />
<ColorMapEntry color="#7FFF00"
quantity="0.099"/>
<ColorMapEntry color="#00CD00"
quantity="0.249"/>
<ColorMapEntry color="#008B00"
quantity="0.499"/>
<ColorMapEntry color="#104E8B"
quantity="0.749"/>
<ColorMapEntry color="#1E90FF"
quantity="0.999"/>
<ColorMapEntry color="#00B2EE"
quantity="1.249"/>
<ColorMapEntry color="#00EEEE"
quantity="1.499"/>
<ColorMapEntry color="#8968CD"
quantity="1.749"/>
<ColorMapEntry color="#912CEE"
quantity="1.999"/>
<ColorMapEntry color="#8B008B"
quantity="2.499"/>
<ColorMapEntry color="#8B0000"
quantity="2.999"/>
<ColorMapEntry color="#CD0000"
quantity="3.999"/>
<ColorMapEntry color="#EE4000"
quantity="4.999"/>
<ColorMapEntry color="#FF7F00"
quantity="5.999"/>
<ColorMapEntry color="#CD8500"
quantity="6.999"/>
<ColorMapEntry color="#EEEE00"
quantity="7.999"/>
<ColorMapEntry color="#FFFF00"
quantity="8.999"/>
</ColorMap>
</RasterSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</NamedLayer>
</StyledLayerDescriptor>
Thanks.
bw
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