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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">The DWithin function in WFS is a true/false function just like the equivalent PostGIS function
<a href="https://postgis.net/docs/ST_DWithin.html">https://postgis.net/docs/ST_DWithin.html</a>. You can’t find the nearest feature with DWithin. A not so good workaround is to increase the distance until the result is not empty.<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">Mapserver does not have a vendor specific function for nearest either like Geotools/Geoserver. Especially the pgnearest function that works with PostGIS backend and returns n nearest
features would be practical for your use case <a href="https://docs.geotools.org/stable/userguide/library/main/function_list.html">https://docs.geotools.org/stable/userguide/library/main/function_list.html</a>. Geotools should also have a similar function
for Oracle that is using the native SDO_NN function.<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">Unfortunately I can’t say how to proceed for making nearest or nearestN queries with Mapserver.<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 style="mso-fareast-language:EN-US">-Jukka Rahkonen-<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"><b><span lang="EN-US">Lähettäjä:</span></b><span lang="EN-US"> mapserver-users <mapserver-users-bounces@lists.osgeo.org>
<b>Puolesta </b>Fran Acuña Parra<br>
<b>Lähetetty:</b> maanantai 27. huhtikuuta 2020 16.59<br>
<b>Vastaanottaja:</b> mapserver-users@lists.osgeo.org<br>
<b>Aihe:</b> [mapserver-users] GetFeature WFS request with Spatial Filter DWITHIN<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal">Hi,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Following the topic about another question that I sent, I'm using a Getfeature WFS request with a DWITHIN spatial filter to returns the closes feature of a layer given some specific coordinates. The request works fine, but when there are
several features that match the filter it doesn't returns the closest one in the first position of the response(GML for example). Is there a way to achieve this?<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks in advance.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Regards,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Fran Acuña<o:p></o:p></p>
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