[Mapserver-users] Map broker?

Daniel Morissette morissette at dmsolutions.ca
Mon Mar 17 08:56:16 EST 2003


Krzysztof Chodak wrote:
> 
> Why do you meen by having "tiled" data? Could you write little more
> about it?
> 

Tiled data is exactly the same as MapInfo's Seamless datasets. 
Basically you split your dataset into multiple files (tiles) and link
them together via a TILEINDEX (in MapServer), or as a Seamless Dataset
(In MapInfo).

BTW, if you do have MapInfo data already, then try using it as is with
MapServer using the OGR support (see
http://mapserver.gis.umn.edu/doc36/ogr-howto.html).  

We've had several reports that MapServer was way faster than MapXtreme
on TAB data.  I'm just guessing here, but perhaps the reason is that
MapXtreme tries to load all the data in memory when it opens a file, and
MapServer/OGR only access the shapes that it needs via the embedded
spatial index in the TAB dataset.  That could be why MapXtreme needs a
map broker and MapServer doesn't.  Note that using tiles or seamless TAB
files will improve performance even more as you zoom into your map.

Daniel
-- 
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 Daniel Morissette               morissette at dmsolutions.ca
 DM Solutions Group              http://www.dmsolutions.ca/
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