[mapguide-internals] Meta-tiling RFC ?

[Trevor Wekel]

Hi Zac,

Yes.  I believe rendering a larger tile and then splitting the resulting image up will be faster.  It's easy to check.  Just change the tile size in serverconfig.ini and compare the rendering times between a 300x300 tile and the 1200x1200 tile.  Splitting the meta tile up will add additional processing but at least you can quantify the raw rendering speedup.

Thanks,
Trevor


-----Original Message-----
From: mapguide-internals-bounces at lists.osgeo.org [mailto:mapguide-internals-bounces at lists.osgeo.org] On Behalf Of Zac Spitzer
Sent: Wednesday, July 23, 2008 7:41 AM
To: MapGuide Internals Mail List
Subject: [mapguide-internals] Meta-tiling RFC ?

Last year during the discussion about changing the tile cache
directory naming structure
and in part of that discussion was briefly mentioned about meta-tiling

The idea being that data access is more expensive that actually
rendering the map, thus when one tile
is requested which doesn't exist, a whole block of missing tiles would
be rendered.

Rendering 4x4 tiles 300px ie 16  seperate tiles all using almost the
same data must be exponentially slower
than extracting and rendering a 1200x1200 once tile and slicing it
back into the 16 tiles

thoughts?

--
Zac Spitzer -
http://zacster.blogspot.com (My Blog)
+61 405 847 168
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