[Mapserver-users] DRGs in MapServer

Thu Jul 1 06:44:15 PDT 2004

I will let more knowledgeable folks correct me on the mapserver stuff,
but I think you want to create a tileindex of your catalog of raster
images, and add that index to your map file. Mapserver will take care of
the rest.

For ArcIMS, I believe you can do the same thing. If your catalog of
raster images are in one folder for example, reference the folder in
your .AXL file instead of individual images, and ArcIMS should load the
correct images as the user pans and zooms around. I seem to remember
seeing something about creating an explicit catalog of images as well,
but that may have only been for ArcSDE as a data source.

Hope that helps a little.  

------------------------------
Mark Adams
Business & Systems Analyst
Cuesta Systems Inc.
5230 South Service Road
Burlington, ON L7L 5K2
Phone: 905-333-4544 x14
Fax: 905-333-0455
Email: markadams at cuestasys.com

-----Original Message-----
From: mapserver-users-admin at lists.gis.umn.edu
[mailto:mapserver-users-admin at lists.gis.umn.edu] On Behalf Of Stephen H.
Savage
Sent: Thursday, July 01, 2004 9:00 AM
To: mapserver-users at lists.gis.umn.edu
Subject: [Mapserver-users] DRGs in MapServer

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