change projection through CGI parameters

[Ning Liu]

Hi Matt,
  Thank you very much.    I am using mapserver as a CGI.  Chaing projection 
works when there is only one parameter about projection.
For example,  &map_projection="proj=latlong" works, but when change map 
projection as following:

  PROJECTION
    "proj=lcc"
    "lat_0=0"
    "lat_1=20"
    "lat_2=60"
    "lon_0=-96"
    "k_0=1"
  END

I don't know how to put all of the parameters in the URL.  I tried 
&map_projection="proj=lcc lat_0=0 lat_1=20.....".

-- Ning


----- Original Message ----- 
From: "Matthew Perry" <perrygeo at gmail.com>
To: "Ning Liu" <ninliu at indiana.edu>
Cc: <MAPSERVER-USERS at lists.umn.edu>
Sent: Friday, February 10, 2006 11:34 PM
Subject: Re: [UMN_MAPSERVER-USERS] change projection through CGI parameters


Ning,

 Are you using mapserver as a CGI or via mapscript? Using mapscript
might be more flexible for this kind of task. If you're using the CGI,
it's possible to change mapfile parameters via URL:

http://mapserver.gis.umn.edu/docs/reference/cgi/controls
and scroll down to "Changing map file parameters via a form or a URL"

 I haven't tried this out so you may need to adjust it but you could
try &map_projection="proj=latlong" .

Also, keep in mind that you'll have to adjust the extents of the image
since that will change with the projection.

matt

On 2/10/06, Ning Liu <ninliu at indiana.edu> wrote:
> I am trying to build a mapserver application in which ther users can 
> specify
> the parameters of the projection and change the map projection.
> Anybody know is it possible with mapserver?
> Thanks a lot.
>
> -- Ning
> Computer Science Department
> Indiana University
>


--
Matt Perry
perrygeo at gmail.com
http://www.perrygeo.net