<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=iso-8859-1">
<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;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 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;}
pre
{mso-style-priority:99;
mso-style-link:"HTML-esimuotoiltu Char";
margin:0cm;
font-size:10.0pt;
font-family:"Courier New";}
span.HTML-esimuotoiltuChar
{mso-style-name:"HTML-esimuotoiltu Char";
mso-style-priority:99;
mso-style-link:HTML-esimuotoiltu;
font-family:Consolas;
mso-fareast-language:EN-US;}
span.Shkpostityyli22
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;
mso-ligatures:none;}
@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="purple" 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">Has there been a change in writing the layer extent?
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I thought that the test <a href="https://github.com/OSGeo/gdal/blob/e4d1f7ff474ceeffd69b1ceef3fa635428788e8c/autotest/ogr/ogr_flatgeobuf.py#L182">
https://github.com/OSGeo/gdal/blob/e4d1f7ff474ceeffd69b1ceef3fa635428788e8c/autotest/ogr/ogr_flatgeobuf.py#L182</a> is testing with TestCapability(ogr.OLCFastGetExtent) if spatial index exists. At least the test file data/testfgb/poly_no_index.fgb shows false
for this capability.<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 am not really interested in the layer extent, what I want to know is how can I check if an existing FlatGeobuf file has spatial index or not.
<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-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span style="mso-fareast-language:FI">Lähettäjä:</span></b><span style="mso-fareast-language:FI"> Even Rouault <even.rouault@spatialys.com>
<br>
<b>Lähetetty:</b> perjantai 6. joulukuuta 2024 12.37<br>
<b>Vastaanottaja:</b> Rahkonen Jukka <jukka.rahkonen@maanmittauslaitos.fi>; 'gdal-dev@lists.osgeo.org' (gdal-dev@lists.osgeo.org) <gdal-dev@lists.osgeo.org><br>
<b>Aihe:</b> Re: [gdal-dev] Where to find a FlatGeobuf test file?<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Hi Jukka,<o:p></o:p></p>
<div>
<p class="MsoNormal">Le 06/12/2024 à 11:13, Rahkonen Jukka a écrit :<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span lang="EN-US">Next question: Why this gives true for me?</span><o:p></o:p></p>
</blockquote>
<p>OLCFastGetExtent != OLCFastSpatialFilter<o:p></o:p></p>
<p>The layer extent is written in the FlatGeoBuf layer even in the SPATIAL_INDEX=NO case, so retrieving the extent is fast.<o:p></o:p></p>
<p>Even<o:p></o:p></p>
<p><o:p> </o:p></p>
<pre>-- <o:p></o:p></pre>
<pre><a href="http://www.spatialys.com/">http://www.spatialys.com</a><o:p></o:p></pre>
<pre>My software is free, but my time generally not.<o:p></o:p></pre>
<pre>Butcher of all kinds of standards, open or closed formats. At the end, this is just about bytes.<o:p></o:p></pre>
</div>
</body>
</html>