AW: [UMN_MAPSERVER-USERS] ZOOM TO A SELECTED OBJECT

[Steve Lime]

Say that again, I'm not sure exactly what you're after. Do you want to populate a map
extent based on the properties of a particular feature?

Steve

>>> Dmitri Mizerkin <mizerkin at WIRZ-KOELN.DE> 5/31/2006 10:54:28 AM >>>
Dear all,

I'm trying to solve a similar problem. My situation is like this:
Say I have two layers on the map - "Achse" for showing all items and
"Sel_Achse" only for selected ones. The map is shown in the browse-mode. I
call the picture with the following line in the address-bar:
http://localhost/cgi-bin/mapserv.exe?map=/ms4w/apps/Avenida/htdocs/Avenida.m 
ap&mode=browse&layer=Achse&layer=Sel_Achse&oid=11 ,
where "oid" is the ObjectID of the item to be shown in the
"selected-item-layer".
I have been playing with zooming for some time and got to the conclusion,
that it is only possible to manipulate it adding 3 additional parameters
(imgxy, imgext and zoom) to the address line. Here's a line implementing a
5x zoom to the centre of the map:
http://localhost/cgi-bin/mapserv.exe?map=/ms4w/apps/Avenida/htdocs/Avenida.m 
ap&mode=browse&layer=Achse&layer=Sel_Achse&oid=11&imgxy=290+149.5&imgext=257
4985.815002+5646056.028076+2587295.900005+5655288.591828&zoom=5
Is it possible to get one of the parameters (imgxy or imgext) at run-time so
that it would be possible to zoom to the right area of the map not waiting
for a user-click? Is there any way to do that using mapxy=shape and
mapext=shape instead? In this case, which parameter could identify the shape
to zoom to?

Many thanks in advance!

________________________________

Dmitri 

 

-----Ursprüngliche Nachricht-----
Von: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] Im
Auftrag von J. Parapar
Gesendet: Dienstag, 30. Mai 2006 21:09
An: MAPSERVER-USERS at LISTS.UMN.EDU 
Betreff: Re: [UMN_MAPSERVER-USERS] ZOOM TO A SELECTED OBJECT

Hi Toni

You can use the itemquery mode to select the municipality and the
mapxy parameter to set the map extent, mapxy=shape set map extent to
the extent of the selected shape. See also the buffer and scale
parameters.

Hope this helps.

Best regards,
Jorge

2006/5/30, toni hernández <toni at sigte.udg.es>:
> Hi,
>
> I have a layer of municipalities boundaries (SHP file with polygons)
>
> How can I zoom to a municipality selected for the user from an HTML form?
> Ex. Zoom to a municpality called "SALT".
>
> Maybe changing the map file dynamically?
> I have been reading about filter and fitleritem but I do not see how can
> make a zoom to a particular municpality.
>
>
>
> thanks
>