4D Raster access NOT via WMS?

[Samuel Hiatt]

Thanks for the help.

It should be very easy to filter my files for time.  What should my mapfile
look like for the 4D layer?  The same thing as for a 4D wms layer, with the
tile index and wms_* metadata tags but I would use mapscript to screen the
files?  Do you know of a way I might reuse the screening code that is used
for 4D WMS?

Thanks!
Sam



On 10/12/07, Yewondwossen Assefa <assefa at dmsolutions.ca> wrote:
>
> 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* <assefa at dmsolutions.ca
> > <mailto:assefa at dmsolutions.ca>> 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
> >
> >
> >     --
> >     ----------------------------------------------------------------
> >     Assefa Yewondwossen
> >     Software Analyst
> >
> >     Email: assefa at dmsolutions.ca <mailto:assefa at dmsolutions.ca>
> >     http://www.dmsolutions.ca/
> >
> >     Phone: (613) 565-5056 (ext 14)
> >     Fax:   (613) 565-0925
> >     ----------------------------------------------------------------
> >
> >
>
>
> --
> ----------------------------------------------------------------
> 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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