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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi Anton,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">What I meant was to have a try by commenting out this line from your mapfile<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:Consolas"> PROCESSING "RESAMPLE=BILINEAR"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:Consolas">Actually it would be interesting to know what really happens if the interpolation/resampling method is configured in the mapfile and GetCoverage comes also with Interpolation
parameter.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:Consolas"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">-Jukka-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b>Lähettäjä:</b> Bakker, Anton <Anton.Bakker@kadaster.nl> <br>
<b>Lähetetty:</b> tiistai 7. huhtikuuta 2020 18.40<br>
<b>Vastaanottaja:</b> Rahkonen Jukka (MML) <jukka.rahkonen@maanmittauslaitos.fi>; mapserver-users@lists.osgeo.org<br>
<b>Aihe:</b> RE: WCS GetCoverage request one by one pixel<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Hi Jukka,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Thanks for your response; do you mean to set the default resampling method in the mapfile? Setting the resampling method in the WCS request does not work
(for both GET and POST requests):<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">POST:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><?xml version="1.0" encoding="UTF-8"?><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><wcs:GetCoverage<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> xsi:schemaLocation="http://www.opengis.net/wcs/2.0<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">
<a href="http://schemas.opengis.net/wcs/2.0/wcsAll.xsd">http://schemas.opengis.net/wcs/2.0/wcsAll.xsd</a>"<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> xmlns="<a href="http://www.opengis.net/wcs/2.0">http://www.opengis.net/wcs/2.0</a>"<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> xmlns:wcs="<a href="http://www.opengis.net/wcs/2.0">http://www.opengis.net/wcs/2.0</a>"<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> xmlns:wcscrs="<a href="http://www.opengis.net/wcs/crs/1.0">http://www.opengis.net/wcs/crs/1.0</a>"<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> xmlns:scal="<a href="http://www.opengis.net/wcs/scaling/1.0">http://www.opengis.net/wcs/scaling/1.0</a>"<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> xmlns:int="<a href="http://www.opengis.net/wcs/interpolation/1.0">http://www.opengis.net/wcs/interpolation/1.0</a>"<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> service="WCS"<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> version="2.0.1"><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:CoverageId>ahn3_05m_dsm</wcs:CoverageId><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:DimensionTrim><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:Dimension>x</wcs:Dimension><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:TrimLow>196396.75</wcs:TrimLow><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:TrimHigh>196396.75</wcs:TrimHigh><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </wcs:DimensionTrim><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:DimensionTrim><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:Dimension>y</wcs:Dimension><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:TrimLow>450031.75</wcs:TrimLow><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:TrimHigh>450031.75</wcs:TrimHigh><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </wcs:DimensionTrim><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:format>image/tiff</wcs:format><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <wcs:Extension><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <int:Interpolation><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> <int:globalInterpolation>NEAREST</int:globalInterpolation><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </int:Interpolation><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"> </wcs:Extension><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"></wcs:GetCoverage><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">GET: <br>
<br>
</span><span lang="NL" style="font-size:9.0pt;font-family:"Helvetica",sans-serif;color:#505050;background:white"><a href="https://geodata.nationaalgeoregister.nl/ahn3/wcs?service=WCS&Request=GetCoverage&version=2.0.1&CoverageId=ahn3_05m_dsm&format=image/tiff&subset=x(196396.75,196396.75)&subset=y(450031.75,450031.75)&INTERPOLATION=NEAREST">https://geodata.nationaalgeoregister.nl/ahn3/wcs?service=WCS&Request=GetCoverage&version=2.0.1&CoverageId=ahn3_05m_dsm&format=image/tiff&subset=x(196396.75,196396.75)&subset=y(450031.75,450031.75)&INTERPOLATION=NEAREST</a><br>
</span><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><br>
Both POST and GET request fail with the same error: "msImageCreate(): Image handling error. Attempt to allocate raw image failed, out of memory." <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Cheers,<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">Anton<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL" style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="NL" style="color:black">From:</span></b><span lang="NL" style="color:black"> Rahkonen Jukka (MML) <<a href="mailto:jukka.rahkonen@maanmittauslaitos.fi">jukka.rahkonen@maanmittauslaitos.fi</a>><br>
<b>Sent:</b> Monday, April 6, 2020 5:26 PM<br>
<b>To:</b> Bakker, Anton <<a href="mailto:Anton.Bakker@kadaster.nl">Anton.Bakker@kadaster.nl</a>>;
<a href="mailto:mapserver-users@lists.osgeo.org">mapserver-users@lists.osgeo.org</a> <<a href="mailto:mapserver-users@lists.osgeo.org">mapserver-users@lists.osgeo.org</a>><br>
<b>Subject:</b> Re: WCS GetCoverage request one by one pixel</span><span lang="NL">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="NL"> <o:p></o:p></span></p>
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<p class="xmsonormal">Hi,<o:p></o:p></p>
<p class="xmsonormal"> <o:p></o:p></p>
<p class="xmsonormal"><span lang="EN-US">Could you have a try with the default resampling “nearest”? And then also with subset having lower limit equal to upper. Now it fails, I tried already.</span><o:p></o:p></p>
<p class="xmsonormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="xmsonormal"><a href="https://geodata.nationaalgeoregister.nl/ahn3/wcs?service=WCS&Request=GetCoverage&version=2.0.1&CoverageId=ahn3_05m_dsm&format=image/tiff&subset=x(196396.75,196396.75)&subset=y(450031.75,450031.75)"><span lang="EN-US">https://geodata.nationaalgeoregister.nl/ahn3/wcs?service=WCS&Request=GetCoverage&version=2.0.1&CoverageId=ahn3_05m_dsm&format=image/tiff&subset=x(196396.75,196396.75)&subset=y(450031.75,450031.75)</span></a><o:p></o:p></p>
<p class="xmsonormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="xmsonormal"><span lang="EN-US">GetCoverage trim with equal low and high has at least worked in the past, see
</span><a href="http://osgeo-org.1560.x6.nabble.com/Why-WCS-2-0-1-slice-is-not-supported-td5343277.html"><span lang="EN-US">http://osgeo-org.1560.x6.nabble.com/Why-WCS-2-0-1-slice-is-not-supported-td5343277.html</span></a><o:p></o:p></p>
<p class="xmsonormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="xmsonormal"><span lang="EN-US">It should be OK by the WCS standard because all intersected pixels should be included and in this case the intersection is a single pixel. But see also
<a href="https://osgeo-org.atlassian.net/browse/GEOS-9553">https://osgeo-org.atlassian.net/browse/GEOS-9553</a> and learn that Geoserver supports slicing but not trimming to one pixel.</span><o:p></o:p></p>
<p class="xmsonormal"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="xmsonormal"><span lang="EN-US">-Jukka Rahkonen- </span><o:p></o:p></p>
<p class="xmsonormal"><o:p> </o:p></p>
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