Jean-Philippe,
I don't think it works like that. Resolution is determined by zoom
factor so you generate metatile at that resolution then you chop that
metatile in tiles of whatever size you specify. So resolution is
controled by zoom not tile size.
-Steve W
On 3/9/2020 2:45 PM, Jean-Philippe Chenel wrote:
Hi,
With MapCache, I want to generate the tiles that will be copied to a
mobile device, on a viewer created with OpenLayers.
When generating a large extent, with multiple levels of zoom, the
files count is really big, so I want to reduce the number of files by
increasing the tile size. I've made a test with tiles 512x512, but
I've realized that the resolution must be changed when changing tiles
size. So, the tiles are bigger, but changing the resolution make
generating the same number of files.
I'm open for workaround and other tricks.
mapcache.xml
<grid name="GoogleMaps512">
<metadata>
<title>GoogleMaps512</title>
</metadata>
<extent>-20037508.3427892480 -20037508.3427892480 20037508.3427892480
20037508.3427892480</extent>
<srs>EPSG:3857</srs>
<srsalias>EPSG:900913</srsalias>
<units>m</units>
<size>512 512</size>
<resolutions>156543.0339280410 78271.51696402048 39135.75848201023
19567.87924100512 9783.939620502561 4891.969810251280
2445.984905125640 1222.992452562820 611.4962262814100
305.7481131407048 152.8740565703525 76.43702828517624
38.21851414258813 19.10925707129406 9.554628535647032
4.777314267823516 2.388657133911758 1.194328566955879
0.5971642834779395</resolutions>
</grid>
<cache name="tmpl_xyz" type="disk" layout="template">
<template>/data/mapcache/tiles/{tileset}/{grid}/{z}/{x}/{y}.{ext}</template>
</cache>
<tileset name="OpenStreetMap">
<source>vmap0</source>
<cache>tmpl_xyz</cache>
<grid>GoogleMaps512</grid>
<format>PNG</format>
</tileset>
With best regards,
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