highlighting a feature in mode=map

Külli Tiits kylli.tiits at GMAIL.COM
Tue Apr 10 12:32:52 EDT 2007


Hi,

May-be there is other methods as well, but I think that easier than the 
below is to use a queryfile. You first have to save the results (the 
highlighted objects) to a queryfile and then add the queryfile part, 
queryfile=/x/xxx.qy, to the map request url.

Actually the CGI reference does not mention, that the queryfile would 
work in map mode, but in practice I have found it working..


Külli

Fischer, Brian wrote:

> Hi John,
> 
> I am not aware of a way to highlight a feature using mode=map, but
> another technique I use is to create a transparent image that is stacked
> on top of your main map image.  Then use some javascript that set's this
> top image's src with a URL that looks something like this
> http://douglas.mapmorph.net/cgi-bin/mapserv.exe?mode=nquerymap&map=/doug
> las_mapmorph/mapmorph/douglas_queries.map&mapext=632381.525426633+155753
> .54781032618+654398.6836237176+172737.2848856585&mapsize=678+523&layers=
> parcel_query&mapshape=640694.7886986885+169847.12695123293+640694.788698
> 6885+169848.12695123293+640695.7886986885+169848.12695123293+640695.7886
> 986885+169847.12695123293&mapsize=678+523
> 
> I've found this technique works very well. You can see it working in one
> of my applications at http://douglas.mapmorph.net/mapmorph/
> 
> Hope this helps,
> Brian
> 
> 
> Brian Fischer
> Houston Engineering, Inc.
> Maple Grove, MN
> (763) 493-4522
> 
> -----Original Message-----
> From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
> Behalf Of John Cole
> Sent: Tuesday, April 10, 2007 10:00 AM
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: [UMN_MAPSERVER-USERS] highlighting a feature in mode=map
> 
> Is it possible to highlight a feature when using mode=map?  I've tried
> setting up the qlayer and qstring to select a feature by a gid, but I'm
> not getting the desired results.
> 
> What are the recommended ways of highlighting a feature without
> returning additional information about the feature (I have an ajax call
> that has already returned that info).
> 
> Thanks,
> 
> John
> --
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