WMS/WFS and (yearly) time-dependent data

[Yewondwossen Assefa]

Stefan Schwarzer wrote:
> Thanks for the help. Hmmm.... not sure if I do really understand what 
> you mean. It still feels a bit awkward in my brain....
> 
> One point that jumps in my mind is the "mypath/myfile" entry. This would 
> be if I am working with shapefiles. But I am working with Postgis. So, 
> how would I have to deal with that one then?
> 

  How is your data structured in postgis ? There is an example in the 
how using a postgis layer with a time field :
http://mapserver.gis.umn.edu/docs/howto/wms_time_support/#example-of-wms-t-with-postgis-tile-index-for-raster-imagery

  Is this similar to you setting ?

Later,

> Merci!
> 
> Stef
> 
> 
>> If your are serving layers as wms you could do soemthing like this :
>>
>>  - define a tileindex layer example:
>>
>>     LAYER
>>     NAME "mylayer"
>>     STATUS ON
>> #    TYPE POLYGON
>>     TYPE RASTER
>>   METADATA
>>     "DESCRIPTION" "mylayer"
>>     "wms_title" "mylayer"
>>     "wms_timeitem"  "time"
>>     "wms_timeextent"  "1970/2006"
>>      "WMS_SRS"   "epsg:4326"
>>   END
>>     SIZEUNITS PIXELS
>>     TILEINDEX "tile_file"
>>     TILEITEM "location"
>>
>>  - have a tile index that has at least 2 field (localtion for the 
>> files, and a time field) :
>>        location       time
>>      mypath/myfile    2005
>>       .....            ...
>>
>>  - doing a request of Getmap : something like
>>    GetMap&Version=1.1.1&LAYERS=mylayer&Time=2005
>>
>>  Not sure if that fits your model.
>>
>> Best Regards
>>
>>
>> Bart van den Eijnden (OSGIS) wrote:
>>> I think you should be looking at tile-indexing for the TIME dimension. A
>>> field in the dbf of the tile-index will probably state which shapefile
>>> Mapserver needs to open for that specific year (and that specific 
>>> theme).
>>> I believe the WCS howto has some information on how to do this, but I 
>>> have
>>> no experience with this whatsoever:
>>> http://mapserver.gis.umn.edu/docs/howto/WCSServerFormatHowTo
>>> Best regards,
>>> Bart
>>> -- 
>>> Bart van den Eijnden
>>> OSGIS, Open Source GIS
>>> http://www.osgis.nl
>>> --------- Oorspronkelijk bericht --------
>>> Van: Stefan Schwarzer <stefan.schwarzer at GRID.UNEP.CH>
>>> Naar: MAPSERVER-USERS at LISTS.UMN.EDU <MAPSERVER-USERS at LISTS.UMN.EDU>
>>> Onderwerp: [UMN_MAPSERVER-USERS] WMS/WFS and (yearly) time-dependent 
>>> data
>>> Datum: 21/02/07 09:44
>>>> Hi,
>>>>
>>>> i read in a document ( http://mapserver.gis.umn.edu/docs/howto/ 
>>>> wms_time_support/view ) that there is a WMS/WFS-parameter one can  
>>>> specify for time dependent data. I am dealing mostly with 
>>>> statistical  data sets, which are covering a period of 1970 to 2006. 
>>>> So it should  be something like TIME=2004 to query a specific year.
>>>>
>>>> For each variable and year there is a five-classes breakup.
>>>>
>>>> It is not clear to me how I should set-up my map file. I guess, I  
>>>> could on one hand just have 36 layers (for each year a layer) - 
>>>> then  I wouldn't need the TIME parameter. But as I have some 1000 
>>>> files to  deal with, my map file would get pretty long...
>>>>
>>>> The other solution would be to have some kind of grouping classes, 
>>>> so  that all my years would fit into one layer, but into 36 classes.
>>>>
>>>> Or is there any kind of more "dynamic" solution?
>>>>
>>>> Thanks for any suggestions!
>>>>
>>>> Stef
>>>>
>>>>
>>
>>
>> ------------------------------------------------------------------
>> Assefa Yewondwossen
>> Software Analyst
>>
>> Email: assefa at dmsolutions.ca
>> http://www.dmsolutions.ca/
>>
>> Phone: (613) 565-5056 (ext 14)
>> Fax:   (613) 565-0925
>> ----------------------------------------------------------------
> 


-- 
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Assefa Yewondwossen
Software Analyst

Email: assefa at dmsolutions.ca
http://www.dmsolutions.ca/

Phone: (613) 565-5056 (ext 14)
Fax:   (613) 565-0925
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