[mapserver-users] on the fly projection modifications

[Kralidis, Tom]

Hi,

Anyone have any experience / suggestions on how to change projection params
on the fly within a MapServer web app?

i.e. An existing .map file:

MAP
 NAME CAN
 EXTENT -180 -90 180 90
 UNITS DD
 TRANSPARENT ON
 SIZE 500 300
 WEB
  TEMPLATE  map.htm
  IMAGEPATH /home/httpd/html/img_cache/
  IMAGEURL  "/img_cache/"
  LOG       process_log
 END
 LAYER
  NAME   world_at_night
  TYPE   RASTER
  STATUS DEFAULT
  DATA   ../firemapping/world_stable_lights.tif
 END
END

..then, in the web app, the user wishes to change projections to:

PROJECTION
  "proj=lcc"
  "lat_0=49n"
  "lon_0=95w"
  "lat_1=49n"
  "lat_2=77n"
END

...how can one set this up via GET or POST.  I'd like to have the page
refresh with coords in LCC, as per this example.

Thanks

..Tom

=================================
Tom Kralidis
Systems Scientist
Canada Centre for Remote Sensing
Tel: (613) 947-1828
http://www.ccrs.nrcan.gc.ca/
=================================