<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;
margin-bottom:.0001pt;
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;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.E-mailStijl17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
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="NL" link="#0563C1" vlink="#954F72">
<div class="WordSection1">
<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We see double tiles in our cache due to ‘different’ TileMatrix values.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Example request<o:p></o:p></p>
<p class="MsoNormal">service?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=brtachtergrondkaart&STYLE=&FORMAT=image/png&TILEMATRIXSET=EPSG:3857&<b>TILEMATRIX=06</b>&TILEROW=32&TILECOL=31<o:p></o:p></p>
<p class="MsoNormal">This results in tiles with key EPSG%3A3857-06-31-32 and with metadata tile_level ‘06’.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is not supported:<o:p></o:p></p>
<p class="MsoNormal">service?SERVICE=WMTS&REQUEST=GetTile&VERSION=1.0.0&LAYER=brtachtergrondkaart&STYLE=&FORMAT=image/png&TILEMATRIXSET=EPSG:3857&<b>TILEMATRIX=6</b>&TILEROW=32&TILECOL=31<o:p></o:p></p>
<p class="MsoNormal">This gives an exception: The requested tile is outside the bounding box of the tile map.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">While the same calls with WMTS Rest style<o:p></o:p></p>
<p class="MsoNormal">wmts/brtachtergrondkaart/EPSG:3857<b>/6/</b>31/32.png<o:p></o:p></p>
<p class="MsoNormal">This results in tiles with key EPSG%3A3857-6-31-32 and with metadata tile_level 6.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">wmts/brtachtergrondkaart/EPSG:3857<b>/06/</b>31/32.png works fine and well and uses the same tiles with key EPSG%3A3857-6-31-32 and with metadata tile_level 6<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">When we seed the layers, the tiles are stored without the leading 0.
<o:p></o:p></p>
<p class="MsoNormal">But these files are not used for the WMTS requests and new tiles are created, so the first type of WMTS requests don’t leverage the cache and create a new set of files for all available files.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We face this with CouchDB caches. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is this as expected? Or is this a bug in the WMTS requests?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">With kind regards,<br>
Cees<o:p></o:p></p>
</div>
<br>
<br>
<font size="2">Disclaimer:<br>
De inhoud van dit bericht is uitsluitend bestemd voor geadresseerde.<br>
Gebruik van de inhoud van dit bericht door anderen zonder toestemming van het Kadaster<br>
is onrechtmatig. Mocht dit bericht ten onrechte bij u terecht komen, dan verzoeken wij u<br>
dit direct te melden aan de verzender en het bericht te vernietigen.<br>
Aan de inhoud van dit bericht kunnen geen rechten worden ontleend.<br>
<br>
Disclaimer:<br>
The content of this message is meant to be received by the addressee only.<br>
Use of the content of this message by anyone other than the addressee without the consent<br>
of the Kadaster is unlawful. If you have received this message, but are not the addressee,<br>
please contact the sender immediately and destroy the message.<br>
No rights can be derived from the content of this message.<br>
</font>
</body>
</html>