How is the selection done? How is the highlighting done? Those processes will 
really impact performance depending on how things are implemented.


[] On Behalf Of Chris Jackson 
Sent: Tuesday, August 24, 2010 3:19 AM
Subject: [mapserver-users] Feature select performance

Hi all

I have rigged up a webGIS app (P.Mapper framework) where one of the underlying 
datasets is a model grid (many thousand cells) in a shapefile.  The data 
displays nice and quick when just viewing, but if I allow the user to select 
say 5000 cells it is very (extremely) slow to redraw with the highlighted 
cells.  Doing the same task in a very old ArcGIS server web app was much 
quicker (admittedly the data was in SDE/MS SQL).  So my question is what is the 
best way to improve performance - would just transferring the shapefile to to 
say a MS SQL 2005 db with the MSSQLSPATIAL add-on be a good step or is there 
are better way to present the data in the Map file?
Many thanks
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