<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 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is there any recommended way to do multi-tileset vertical assembly in MapCache?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I have the following setup:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>There are a number (over 30) fully seeded tile caches covering adjacent but spatially distinct areas. These tilesets were fully seeded down to the lowest level, with the seeding restricted to an irregular polygon extent. Areas beyond the edge of the polygon are not seeded at all. That is, any tiles within the dataset’s rectangular extents but outside the polygon extent are not seeded. The tilesets do not refer back to a MapServer source for any requests. This means that any tile requests between the restricted extent and the polygon extent return a blank image and an HTTP 404 error.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am trying to serve the separate tile sets independently, but also combined into a single “mosaic-like” tile layer, to be rendered on the fly from the individual tilesets. The current set up has the mosaic layer in the MapCache config as a WMS source, referencing the tile caches as individual layers, looping back into itself through localhost. It looks like this:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> <source name="MOSAIC_LAYER" type="wms"><o:p></o:p></p><p class=MsoNormal> <getmap><o:p></o:p></p><p class=MsoNormal> <params><o:p></o:p></p><p class=MsoNormal> <format>image/png</ format ><o:p></o:p></p><p class=MsoNormal> <layers>LAYER1,LAYER2,LAYER3</layers><o:p></o:p></p><p class=MsoNormal> <transparent>true</transparent><o:p></o:p></p><p class=MsoNormal> </params><o:p></o:p></p><p class=MsoNormal> </getmap><o:p></o:p></p><p class=MsoNormal> <http><o:p></o:p></p><p class=MsoNormal> <url>http://localhost/mapcache/service</url><o:p></o:p></p><p class=MsoNormal> </http><o:p></o:p></p><p class=MsoNormal> </source><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The problem is that if any tile in the 30 separate cache layers is missing, MapCache returns a blank tile for the mosaic layer. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Is there another way of configuring a combined mosaic layer in MapCache, or does this require updates to the code?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>---------------------------------------<o:p></o:p></p><p class=MsoNormal><b><span style='color:black'>John Taranu<o:p></o:p></span></b></p><p class=MsoNormal><span style='color:black'>Senior Web Developer<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'>First Base Solutions Inc<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'>140 Renfrew Drive, Suite 100<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'>Markham, ON, L3R 6B3<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'>phone: 905-477-3600 ext. 302<o:p></o:p></span></p><p class=MsoNormal><span style='color:black'>email: </span><a href="jtaranu@firstbasesolutions.com"><span style='color:#244061'>jtaranu@firstbasesolutions.com</span></a><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='color:black'>web: </span><a href="http://www.firstbasesolutions.com/"><span style='color:#244061'>firstbasesolutions.com</span></a><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='color:black'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>