[mapguide-users] render service

[Walt Welton-Lair]

One thing to note (and something that should probably be addressed)...

If you already have tiles in your cache that were rendered as PNGs, and
then you request them as JPG, I'm pretty sure you'll just get back the
PNGs.  For existing tiles, the server does not check the image types and
do conversion.

Walt

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Andy
Morsell
Sent: Wednesday, March 07, 2007 5:22 PM
To: 'MapGuide Users Mail List'
Subject: RE: [mapguide-users] render service

You can greatly improve the speed of a site by having MapGuide server
generate JPG maps rather than PNG.  Unfortunately, this must be done on
a
server global basis and JPG does not look nearly as nice as PNG.  This
has a
particularly favorable affect when using imagery layers in your map.  In
my
non-scientific tests, I saw individual map requests go from 1 MB PNG's
to 75
KB JPG's.  

There are cases where you simply cannot make this setting (since it's
global) particularly if you are using base layer tiles in your maps
since
the JPG images are not transparent and will cover your PNG tiles.  There
is
an RFC in the works that will allow the configuration of base layer
tiles to
be output as JPG images.  The map overlays would remain transparent
PNG's
but this should yield good performances since the PNG's are only
rendered
with your vector information.

To try this, edit the RequestMapImage() function of the
ajaxmappane.templ
file and change the FORMAT parameter to JPG instead of PNG 


Andy Morsell, P.E.
Spatial Integrators, Inc.
http://www.SpatialGIS.com

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of alucas
Sent: Wednesday, March 07, 2007 3:39 AM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] render service


Hello,

I'm testing mapguide server performance with sql server 2005 through
FDO.
One of the tasks that get more time to do is to render the png image.
So, I
think this task would be better enabling apache compression for png
images.

What do you think about?

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