[Mapserver-users] DRGs in MapServer

Thu Jul 1 05:59:49 PDT 2004

Greetings,

   In AZ we have nearly 2,000 DRG's at 1:24,000 scale.  We would like to have
these maps displayed as the background for our web site that serves
archaeological sites and projects.  However, in ArcIMS, which we are currently
using, all these image layers would have to be pre-loaded into the map; this is
clearly out of the question.  What we need to do is add and subtract image
layers from the map on-the-fly, as a user pans or zooms around the map.  Is
this something that MapServer can do?  Ideally, at the scale at which we want
the DRGs to be displayed, portions of no more than 4 map tiles would be
displayed at any time.

   Basically, ArcIMS defines the map once, with all its layers loaded.  Then,
for each user session, the map server sends out session data such as the view
extent, which layers are on, etc.  You can't redefine the map's layers because
it involves a situation where each user would get a different map definition
rather than a different instance of the same map.  Is the the same way thet
MapServer works?

Thanks,

-Steve