<p>It would be great to support UTFGrid generation using renderd and mod_tile.</p>
<p><a href="https://github.com/mapbox/utfgrid-spec">https://github.com/mapbox/utfgrid-spec</a></p>
<p>An example UTFGrid-enabled mapnik xml file is at <a href="https://gist.github.com/gravitystorm/5824793">https://gist.github.com/gravitystorm/5824793</a></p>
<p>I'd suggest that it's a per-layer option to also generate the UTFGrid at the same time as the png (or other raster) output, and expire them as a pair. However, I can see there being some (rare) usecases where you may wish to generate UTFGrids without a corresponding png output.</p>
<p style="font-size:small;-webkit-text-size-adjust:none;color:#666;">—<br>Reply to this email directly or <a href='https://github.com/openstreetmap/mod_tile/issues/34'>view it on GitHub</a>.<img src='https://github.com/notifications/beacon/g8smGCFOcVLF28Q-xX3zcU3J5gQqpslbAGZZZbQkPPuSUm_BqEqrCDE-FkMQQa7X.gif' height='1' width='1'></p>