[ka-Map-users] Improving ka-map speed with non-cached WMS?
Bob.Bistrais at maine.gov
Mon Dec 14 16:46:03 EST 2009
We have our imagery data for the WMS services in three different
formats- JP2, SID, and GTIFF. I've been doing most of my testing with
the jp2, since that's statewide orthoimagery.
The application is presenting the WMS service in PNG24.
A gdalinfo for one of the images gives the following:
Driver: JP2ECW/ERMapper JPEG2000
Size is 5655, 7594
Coordinate System is:
Origin = (429916.000000000000000,4914197.000000000000000)
Pixel Size = (1.000000000000000,-1.000000000000000)
Upper Left ( 429916.000, 4914197.000)
Lower Left ( 429916.000, 4906603.000)
Upper Right ( 435571.000, 4914197.000)
Lower Right ( 435571.000, 4906603.000)
Center ( 432743.500, 4910400.000)
Band 1 Block=5655x1 Type=Byte, ColorInterp=Red
Band 2 Block=5655x1 Type=Byte, ColorInterp=Green
Band 3 Block=5655x1 Type=Byte, ColorInterp=Blue
As for the mapfile layer- do you mean the mapfile which consumes the WMS
(part of the ka-map app), or the file which creates the WMS service? If
you mean the file which consumes the WMS, this is it:
"wms_abstract" "NAIP 2007 imagery"
From: Stephen Woodbridge [mailto:woodbri at swoodbridge.com]
Sent: Thursday, December 10, 2009 3:14 PM
To: Bistrais, Bob
Cc: ka-map-users at lists.maptools.org
Subject: Re: [ka-Map-users] Improving ka-map speed with non-cached WMS?
Bistrais, Bob wrote:
> I have a ka-map application which consumes WMS services, consisting of
> various imagery layers. We don't want to precache tiles for the WMS.
> We also have precached tiles for vector data in the application.
> I don't know if it matters, but the web server uses IIS, not Apache.
> Other viewers, such as ArcGIS and Quantum GIS, can consume the same
> WMS services and have much faster draw times than our Ka-Map
> We would like to see improved draw times for the WMS imagery, again,
> without precaching it. Can anyone make recommendations or point me to
> a resource discussing this?
Probably need more information like:
What your mapfile LAYER looks like?
What format is the raster data in?
What does gdalinfo /path/to/a/raster.file look like?
and this is really a question about how to increase performance of
raster data from mapserver and might get a better response from that
I think there is a page(s) in mapserver docs on how to do this:
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