Samuel Hiatt wrote:
Hi! Thanks for the reply.
So I suppose when I make a WMS request with TIME Mapserver applies the
filter behind the scenes, finding which feature in my tile_index.shp
represents the correct time and then processes the raster pointed to by
that feature? So if I want to implement the same kind of thing with
mapscript I'd have to write the filter myself?
That is correct : assuming that the underlying data can be filtered
using a time field, you need to know the attribute and build the time
expression and set it using mapscript.
The reason I am interested in doing this is to extend temporal
functionality to ka-map. I may end up abandoning that approach and
moving to a javascript WMS client (like OpenLayers of MapBuilder) instead.
Thanks for your help.
Sam
On 10/11/07, *Yewondwossen Assefa* <[EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
Hi there,
The Time parameter that is sent with a WMS request is simply
converted
to a time expression and set on the filter object of the layer. In the
case of wms. the metadata wms_timeitem will be used for the
attribute name.
if you are using mapscript, you would need to build the time
expression manually and set the filter parameter. Please refer to
http://mapserver.gis.umn.edu/docs/howto/wms_time_support (section 2.5)
to see how time parameters are interpreted.
Best Regards,
Samuel Hiatt wrote:
> I am excited to see that Mapserver supports 4D raster layers for WMS,
> but I am curious if this functionality can be extended to mapscript
> calls as well? For example, if I set up a raster layer with a TIME
> dimension then will it be possible for me to request an image for a
> specific time with mapscript? Or would I have to do this with a
WMS call?
>
> Thanks!
>
> Sam
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Assefa Yewondwossen
Software Analyst
Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
http://www.dmsolutions.ca/
Phone: (613) 565-5056 (ext 14)
Fax: (613) 565-0925
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Assefa Yewondwossen
Software Analyst
Email: [EMAIL PROTECTED]
http://www.dmsolutions.ca/
Phone: (613) 565-5056 (ext 14)
Fax: (613) 565-0925
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