Can anyone help with this last question? I'm hesitant to start hacking at this 'cause I don't really feel like re-inventing the wheel... again. Is anyone familiar with the mechanism that is used when mapserver gets a WMS request with a TIME parameter? Maybe the solution lies there.
The metadata tags required to make 4D WMS layers work all have "wms_ ..." at the beginning. I imagine that extending this functionality to any type of mapserver request (WMS, mapscript, CGI) would be very valuable (if it doesn't exist already). Thanks for your help. Sam On 10/12/07, Samuel Hiatt <[EMAIL PROTECTED]> wrote: > > 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 > > ---------------------------------------------------------------- > > > > >
