<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
span.Shkpostityyli17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 2.0cm 70.85pt 2.0cm;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang="FI" link="#0563C1" vlink="#954F72" style="word-wrap:break-word">
<div class="WordSection1">
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I hoped that the OAPIF driver would honor the check box “Only request features overlapping the view extent” but at least in QGIS 3.32 that does not happen.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">How to test:<br>
- Set project into EPSG:4326<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- Open the Debugging/development tools<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- Zoom for example to lat-lon 63.189111,23.538514 and set scale into 1:5000<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- Add collection “building” from an open OAPIF service
<a href="https://beta-paikkatieto.maanmittauslaitos.fi/inspire-buildings/features/v1/">
https://beta-paikkatieto.maanmittauslaitos.fi/inspire-buildings/features/v1/</a>. Use feature paging with page size 1000.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- Remove the layer from the project because otherwise QGIS continues downloading a few million building polygons<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">- Check the http requests<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The http history shows that after a bunch of probing OAPIF requests QGIS sends plain &items= request without &bbox= and thus asks the server to send the whole collection. What QGIS does right is that it follows the next-links
and continues downloading.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a href="https://beta-paikkatieto.maanmittauslaitos.fi/inspire-buildings/features/v1/collections/building/items?limit=1000&crs=http://www.opengis.net/def/crs/EPSG/0/4326">https://beta-paikkatieto.maanmittauslaitos.fi/inspire-buildings/features/v1/collections/building/items?limit=1000&crs=http://www.opengis.net/def/crs/EPSG/0/4326</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I wonder if the view extent limit should work also for OAPIF or is a not-yet implemented feature?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
</div>
</body>
</html>