Le 18/02/2013 10:15, Chris forum a écrit :
> Hi,
>
> Yllka> Interesting topic! If possible, don't forget to show us your final
> results!
>
> Thomas> Thanx, very interesting tip! Should try it asap!
> (On your example, beware on the UNIQUE typo ; )
Oops!
>
> With a Shapefile, using an index file (QIX) speeds up data visualisation
> for sure.
In this case, don't specify file extension in the "DATA".
> Tiling to speed up access to WMS layers, with TileCache or the Mapserver
> Mapcache.
> Put the generated/temp files from Mapserver on a RAM disk (IMAGEPATH
> parameter of the mapfile).
Have you got doc for this point please?
For Raster data, you can use tiles (use gdaltindex) and then create the
QIX file.
Generally, be careful with mapserver on the fly re-projection. It is to
avoid if you want to speed up MapServer response.
>
> Chris
>
>
> On Mon, Feb 18, 2013 at 9:43 AM, Thomas RAFFIN <traf...@sirap.fr> wrote:
>
>> Hi,
>>
>> I've made a hack in pmapper few years ago. This one allows you to
>> specify 2 data sources for each layer:
>> LAYER
>> .....
>> DATA "the_geom FROM your_heavy_view USING UNQIUE gid"
>> METADATA
>> PM_RESULT_DATASUBSTITION "the_geom FROM your_geo_table USING
>> UNQIUE gid"
>> ...
>> END
>> ...
>> END
>>
>> For instance " your_heavy_view" is a view that join a geographical table
>> ("your_geo_table") with many other tables. The attributes "the_geom" and
>> "gid" have to be the same names and values in both table and view.
>>
>> The "DATA" value is the habitual one whereas "PM_RESULT_DATASUBSTITION"
>> is used to draw / select / query graphically / etc... to speed up pmapper.
>>
>> Be careful : all attributes used for label, classitem, binding, etc..
>> have to be in the main table.
>>
>> It has only been tested with postgreSQL/postigs but could works with
>> other data types.
>>
>> Thomas
>>
>> Le 16/02/2013 18:35, yllka baci a écrit :
>>> Hello Pmapper users....
>>> I'm going to write a paper on techniques that speed up data visualisation
>>> on Web GIS applications.
>>> Can any one of you tell me the techniques that he (she) knows?
>>>
>>> ps: pmapper.net will be the main reference of this paper :) thank you
>> very
>>> much for the support.
>> --
>>
>>
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> is your hub for all things parallel software development, from weekly thought
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--
Thomas RAFFIN
Chef de Projet Internet
traf...@sirap.fr <mailto:traf...@sirap.fr> Sirap <http://sirap.fr>
Tel
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is your hub for all things parallel software development, from weekly thought
leadership blogs to news, videos, case studies, tutorials, tech docs,
whitepapers, evaluation guides, and opinion stories. Check out the most
recent posts - join the conversation now. http://goparallel.sourceforge.net/
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