[Mapserver-users] Problem setting up direct URLs when using MapScript

[Lowell Filak]

Not to be short worded about it but - deffinitely.
Lowell

The following message was sent by AMC Story <s9646183 at sms.ed.ac.uk> on
Tue, 22 Jul 2003 17:23:53 +0100 (BST).

> Hi Lowell,
> 
> The source of the map image is: src="/tmp/map.png"
> 
> Is the problem then, that I need a unique id for each map created?
> 
> Thanks,
> Ali
> 
> Quoting Lowell Filak <lfilak at medinaco.org>:
> 
> > What does the "<img src=..." part of the returned page look like?
> > Lowell
> > 
> > The following message was sent by AMC Story <s9646183 at sms.ed.ac.uk> on
> > Tue, 22 Jul 2003 15:03:48 +0100 (BST).
> > 
> > > Hi there,
> > > 
> > > My problem is that I've set up a user interface to my application
> > using perl 
> > > MapScript.  The script utilises a form that passes back variables
> > such
> > as the 
> > > current map extents, previous map extents, mouse click locations,
> > modes (ie. 
> > > pan north, zoomin, previous extent etc), active layers and so on.  I
> > then use 
> > > MapScript to manipulate these variables, set the new extents and
> > active layers 
> > > accordingly and then redraw the map.  
> > > 
> > > So, the user is first presented with a screen that lists all the
> > features of 
> > > interest (i.e. all the point objects in my shapefile).  The user can
> > then click 
> > > on the url of each feature to go to the map interface page and see a
> > map that 
> > > is zoomed in to that point.  The user can also click on an image on
> > the opening 
> > > page which submits a form with the hidden variable "mode" set to
> > "full_extent", 
> > > so that they see the whole world map with all the features displayed.
> > > 
> > > The problem is, that when you click on the url (which looks like
> > this...
> > > <a
> > href="http://file_path/script?lon=123.64&lat=-0.51&mode=each_feature">)
> > the 
> > > variables are passed and the script runs.  The script then works out
> > the extent 
> > > of the new map based on these variables and a new map should be
> > created with 
> > > this extent (ie the extents for $current_map are set to their zoomed
> > in values, 
> > > and then the $current_map->draw method draws the map).  However, to
> > see the 
> > > zoomed in map, you have to manually refresh the browser, or put in a
> > line to 
> > > the script which does this automatically for you.  Otherwise, the map
> > is drawn 
> > > as if the extent values haven't actually been changed from those in
> > the map 
> > > file.  Can anyone see why this might be the case?  I've printed out
> > the extents 
> > > of the map object just before it gets drawn, and they definately have
> > been 
> > > updated, but the map object that is drawn doesn't seem to reflect
> > this..??
> > > 
> > > Sorry if this is a really long-winded e-mail ;)
> > > 
> > > Many thanks for any thoughts,
> > > Ali
> > > _______________________________________________
> > > Mapserver-users mailing list
> > > Mapserver-users at lists.gis.umn.edu
> > > http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> > 
> > 
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