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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">Hi,<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">Here is more accurate documentation but only in the text
<a href="https://www.mapserver.org/ogc/wcs_server.html">https://www.mapserver.org/ogc/wcs_server.html</a><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>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">“The convention is that once (wcs|ows)_extent and one of (wcs|ows)_size and (wcs|ows)_resolution is set in the layer metadata, all the coverage specific metadata will be retrieved from
there. Otherwise the source image is queried via GDAL, if possible.” <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>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">It seems that only wcs_extent is documented in the list of metadata elements but this is what they do:<o:p></o:p></span></p>
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<li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="mso-fareast-language:EN-US">wcs_extent defines the bounding box or your coverage -> that will go into DescribeCoverage<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="mso-fareast-language:EN-US">wcs_size is the size of the coverage as pixels -> pixel size can be computed by extent and size<o:p></o:p></span></li><li class="MsoListParagraph" style="margin-left:0cm;mso-list:l0 level1 lfo1"><span lang="EN-US" style="mso-fareast-language:EN-US">wcs_resolution tells the pixel size explicitly -> size of the coverage in pixels can be computed<o:p></o:p></span></li></ul>
<p class="MsoNormal"><span lang="EN-US" 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">We have in the LAYER-METADATA:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">"wcs_resolution" "0.5 0.5"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">"wcs_extent" "19970 6597278 749676 7785300"<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>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">That should be enough and Describe Coverage will have correct limits, origin, and offset vectors in RectifiedGrid.<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>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US">-Jukka Rahkonen-<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>
<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> MapServer-users <mapserver-users-bounces@lists.osgeo.org>
<b>Puolesta </b>Carl Godkin<br>
<b>Lähetetty:</b> keskiviikko 20. lokakuuta 2021 1.17<br>
<b>Vastaanottaja:</b> mapserver-users@lists.osgeo.org<br>
<b>Aihe:</b> [mapserver-users] WCS Tile index question<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi again,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I am working with Mapserver trying to set up a WCS layer based on a large collection of SRTM .hgt files.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Since I have many input files instead of a single file, I want to use a tile index. I know how to make and use a tile index for WMS, but there's a twist for WCS that I don't understand.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">According to this section of the docs:<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://mapserver.org/optimization/tileindex.html?highlight=wcs_resolution#note-for-wcs-layers"> https://mapserver.org/optimization/tileindex.html?highlight=wcs_resolution#note-for-wcs-layers<br>
</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I need to set <span style="font-size:9.5pt;font-family:"Arial",sans-serif;color:#3E4349">“wcs_extent”, “wcs_size”, and “<span class="gmail-highlighted"><span style="background:#FBE54E">wcs_resolution</span></span>” but I don't see where
they are defined or documented.</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Can you point me to documentation? The WCS Use Cases page gives some hints so I think I understand wcs_extent (though it's "ows_extent" in some examples there so I guess these are interchangeable?) <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">How are the others defined?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thank you for your help,<o:p></o:p></p>
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<p class="MsoNormal">carl<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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