Dear all
In case of interest, I added a simple solution for on-disk tile caching
for tiled layers in pm5. It only requires enough disk space for the
cache image tiles and a few config parameters.
It's mainly useful for large datasets that shall be displayed at lower
zoom levels but have too many details to be rendered acceptably fast at
lower zoom levels. Could be vector layers with a lot of details or
raster layers with lots of single files to be read.
The advantage to a fully-fledged tile cache solution (like MapCache) is
that it does not require additional service set-ups. And in case of
vector layers it also supports legend icons (and printing, once it is
fully working...).
If you want to try, see changesets 1372 and 1375 for the files to be
updated from svn trunk. Config parameters are listed here:
http://svn.pmapper.net/trac/wiki/XmlFileSettingsFive?action=diffversion=12
could look like
category name=cat_admin imgFormat=png32 olTheme=admin buffer=0
themeType=PMTile tileCache=true cacheMaxLevel=12
and needs under map an entry like
tileCacheRoot/path/to/pmapper_tilecache/default/tileCacheRoot
A corresponding basic seeding functionality is currently in test.
Out-dated tile files, e.g. due to changes in symbology, need to removed
manually in the directory of the tile cache. But the Unix find command
allows a quite comprehensive functionality for this.
Regards
/A
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