Hi We use the back end CGI extensively and it is extremely fast. It is simply a case of being able to define what type of constraint you want against each layer (tolerance etc) - I'm normally surprised if mapserver takes more than a second or two to query up to 20-30 individual layers...
Hope this reassures! Mike 2009/9/1 Chris Kantarjiev <[email protected]> > Sure. The basic use case is: > > User navigates to a particular, known, lat/lon as starting point; this can > be by entering the known lat/lon values, or by navigation around cities. > > User then selects one or more links and can inspect attributes associated > with those links - in particular, link_id and direction. Initial selection > could be by sweeping out an area, but should also provide a way of > adding/removing specific links from the selection (control-select). > > Did that makes sense? > > chris > > > Steve Lime wrote: > >> You'd be surprised with what you can do with the CGI backend. It's >> certainly possible, with the right >> web client (e.g. something like GeoMoose or OpenLayers) to craft queries >> against the CGI to select >> one or many features from one or many layers using a point, box or >> arbitrary geometry. Perhaps if >> you could sketch out a use case or two... >> >> Steve >> >> On 9/1/2009 at 12:49 PM, in message <[email protected]>, >>>>> Chris >>>>> >>>> Kantarjiev <[email protected]> wrote: >> >>> I'm just starting to play with query mode and find it very useful. I have >>> an interaction style in mind that would let me select and highlight several >>> (possibly connected) links in a layer in a fairly interactive style (more >>> like one would do with ArcGIS, I guess). I'm pretty sure that I won't be >>> successful doing this with the basic CGI, and am overwhelmed by the number >>> of Ajax layers that I might choose from. >>> >>> Are there documents/pages out there that might give me some guidance >>> about what's possible with the various packages? >>> >>> Thanks, >>> chris >>> _______________________________________________ >>> mapserver-users mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/mapserver-users >>> >> >> > _______________________________________________ > mapserver-users mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/mapserver-users >
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