Chris,
Thanks for the answer, if I put the window in the XML file it indeed
also works for me.
But in my application I am sampling the GDAL dataset from code and
setting a different window each time from code as well. So to modify the
WMS XML every time in that case would not really be a work able
solution.
This approach worked fine in the past with another WMS server, so I was
hoping I missed some setting somewhere or so. I'll do some more
experimentation.
Arno
On 2018-07-10 07:04, Chris Smemoe wrote:
Arno,
I suspect the black lines has something to do with using the -projwin
argument to gdal_translate along with the DataWindow tag information in
the
XML file. The following XML works fine for me with the following
command
line: "gdal_translate wms.xml test.tif"
<GDAL_WMS>
<Service name="WMS">
<Version>1.1.1</Version>
<ServerUrl>https://gis.apfo.usda.gov/arcgis/services/NAIP/Illinois/ImageServ
er/WMSServer</ServerUrl>
<ImageFormat>tiff</ImageFormat>
<Layers>0</Layers>
<BBoxOrder>xyXY</BBoxOrder>
<SRS>EPSG:4326</SRS>
</Service>
<DataWindow>
<UpperLeftX>-89.0</UpperLeftX>
<UpperLeftY>42.0</UpperLeftY>
<LowerRightX>-88.0</LowerRightX>
<LowerRightY>41.0</LowerRightY>
<SizeX>1024</SizeX>
<SizeY>1024</SizeY>
</DataWindow>
<UnsafeSSL>true</UnsafeSSL>
</GDAL_WMS>
Chris
-----Original Message-----
From: gdal-dev [mailto:gdal-dev-boun...@lists.osgeo.org] On Behalf Of
Arno
Gerretsen
Sent: Monday, July 09, 2018 12:01 PM
To: gdal-dev@lists.osgeo.org
Subject: [gdal-dev] WMS, blocksize and black lines
Hi all,
I'm trying to create a WMS XML to access some WMS data in GDAL. But I
get black lines in the resulting image. I have found out that if I
reduce the size of the BlockSize in the WMS XML that the lines get more
narrow, but the download speed of the images also reduces a lot. Am I
missing some setting here to make it work?
This is the XML file I use:
<GDAL_WMS>
<Service name="WMS">
<Version>1.1.1</Version>
<ServerUrl>https://gis.apfo.usda.gov/arcgis/services/NAIP/Illinois/ImageServ
er/WMSServer?SERVICE=WMS</ServerUrl>
<Layers>0</Layers>
<SRS>EPSG:4326</SRS>
<ImageFormat>image/tiff</ImageFormat>
<Transparent>FALSE</Transparent>
<BBoxOrder>xyXY</BBoxOrder>
</Service>
<DataWindow>
<UpperLeftX>-91.562525</UpperLeftX>
<UpperLeftY>42.562525</UpperLeftY>
<LowerRightX>-87.437470</LowerRightX>
<LowerRightY>36.937474</LowerRightY>
<SizeX>370834</SizeX>
<SizeY>625056</SizeY>
</DataWindow>
<BandsCount>4</BandsCount>
<UnsafeSSL>true</UnsafeSSL>
<BlockSizeX>1024</BlockSizeX>
<BlockSizeY>1024</BlockSizeY>
</GDAL_WMS>
And this is a sample call that shows the black lines:
gdal_translate -projwin -88.0 42.0 -87.99 41.99 wms.xml test.tif
With regards,
--
Arno
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