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 <[EMAIL PROTECTED]> 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* <[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 > > > > > > -- > > ---------------------------------------------------------------- > > Assefa Yewondwossen > > Software Analyst > > > > Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > > http://www.dmsolutions.ca/ > > > > Phone: (613) 565-5056 (ext 14) > > Fax: (613) 565-0925 > > ---------------------------------------------------------------- > > > > > > > -- > ---------------------------------------------------------------- > Assefa Yewondwossen > Software Analyst > > Email: [EMAIL PROTECTED] > http://www.dmsolutions.ca/ > > Phone: (613) 565-5056 (ext 14) > Fax: (613) 565-0925 > ---------------------------------------------------------------- > >
