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Map refresh slower at bigger scale

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	Map refresh slower at bigger scale by Federica De Martin :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Hi, I've got a Chameleon application that takes data from a big Postgis database (a dump of 300MB). My problem is that the refresh of the map takes much more time when I am at a bigger scale. For example with the same layer activated: -if I am at scale 1:100.000 and I zoom to scale 1:5.000 the refresh takes more or less 10 seconds -if I am at scale 1:5.000 and I zoom to scale 1:1.000 the refresh takes around 30 or more seconds (it depends on the number of object in the area) What I would like to understand is why there is so much difference in the drawing time of this two maps. Why is the second dwawing time greater then the first drawing time? I was expecting exactly the contrary, is it normal or is there something wrong in my mapfile or somewhere else? Do you know what I can check to solve this problem? And can you suggest me how I can make my application faster? Thank you all in advance. Federica _______________________________________________ Chameleon mailing list Chameleon@... http://lists.maptools.org/mailman/listinfo/chameleon
	RE: Map refresh slower at bigger scale by Julien-Samuel Lacroix-2 :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Hi, It's a matter of data optimization. I suggest you to try to optimize your data and mapfile before continuing with Chameleon. The MapServer mailing-list will be the right place to ask question about that. Julien -----Original Message----- From: "Federica De Martin" <federica.demartin@...> Sent: Tuesday, September 30, 2008 11:11am To: chameleon@... Subject: [Chameleon] Map refresh slower at bigger scale _______________________________________________ Chameleon mailing list Chameleon@... http://lists.maptools.org/mailman/listinfo/chameleon Hi, I've got a Chameleon application that takes data from a big Postgis database (a dump of 300MB). My problem is that the refresh of the map takes much more time when I am at a bigger scale. For example with the same layer activated: -if I am at scale 1:100.000 and I zoom to scale 1:5.000 the refresh takes more or less 10 seconds -if I am at scale 1:5.000 and I zoom to scale 1:1.000 the refresh takes around 30 or more seconds (it depends on the number of object in the area) What I would like to understand is why there is so much difference in the drawing time of this two maps. Why is the second dwawing time greater then the first drawing time? I was expecting exactly the contrary, is it normal or is there something wrong in my mapfile or somewhere else? Do you know what I can check to solve this problem? And can you suggest me how I can make my application faster? Thank you all in advance. Federica _______________________________________________ Chameleon mailing list Chameleon@... http://lists.maptools.org/mailman/listinfo/chameleon
	Re: Map refresh slower at bigger scale by Federica De Martin :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. Hi Julien, thank you for the fast answer. What do you mean with 'optimize your data'? I'm trying to aggregate some feature in a layer, where it is possible, but I've got many data that I can't modify... Federica 2008/9/30 <jlacroix@...> Hi, It's a matter of data optimization. I suggest you to try to optimize your data and mapfile before continuing with Chameleon. The MapServer mailing-list will be the right place to ask question about that. Julien -----Original Message----- From: "Federica De Martin" <federica.demartin@...> Sent: Tuesday, September 30, 2008 11:11am To: chameleon@... Subject: [Chameleon] Map refresh slower at bigger scale _______________________________________________ Chameleon mailing list Chameleon@... http://lists.maptools.org/mailman/listinfo/chameleon Hi, I've got a Chameleon application that takes data from a big Postgis database (a dump of 300MB). My problem is that the refresh of the map takes much more time when I am at a bigger scale. For example with the same layer activated: -if I am at scale 1:100.000 and I zoom to scale 1:5.000 the refresh takes more or less 10 seconds -if I am at scale 1:5.000 and I zoom to scale 1:1.000 the refresh takes around 30 or more seconds (it depends on the number of object in the area) What I would like to understand is why there is so much difference in the drawing time of this two maps. Why is the second dwawing time greater then the first drawing time? I was expecting exactly the contrary, is it normal or is there something wrong in my mapfile or somewhere else? Do you know what I can check to solve this problem? And can you suggest me how I can make my application faster? Thank you all in advance. Federica _______________________________________________ Chameleon mailing list Chameleon@... http://lists.maptools.org/mailman/listinfo/chameleon
	Re: Map refresh slower at bigger scale by nsavard :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Federica De Martin wrote: > Hi Julien, > thank you for the fast answer. What do you mean with 'optimize your data'? > I'm trying to aggregate some feature in a layer, where it is possible, but > I've got many data that I can't modify... > > Federica > > > Federica, He means that there are some tricks to make your map be read faster (parsing). Check here: http://mapserver.gis.umn.edu/docs/howto/mapfiletuning Norm _______________________________________________ Chameleon mailing list Chameleon@... http://lists.maptools.org/mailman/listinfo/chameleon