[Mapserver-users] Multi resolution select layer

[Ed McNierney]

Sarawut -

Create a GROUP named LANDSAT, for example, and put the statement

GROUP LANDSAT

In each of the three layer definitions.  Then add a MINSCALE and
MAXSCALE statement to each layer so at any given scale only one of the
three layers is visible.  Then refer to the layer as LANDSAT (that is,
by the group name, not the layer names) to turn it on and off.

	- Ed

Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA  01863
Phone: (978) 251-4242  Fax: (978) 251-1396
ed@topozone.com


-----Original Message-----
From: Sarawut Ninsawat [mailto:sarawut@ait.ac.th] 
Sent: Monday, June 23, 2003 4:54 AM
To: mapserver-users@lists.gis.umn.edu
Subject: [Mapserver-users] Multi resolution select layer

Dear

I have the big mosaic Landsat 5 image(4.3 GB). Then I try to speed up by

reduce resolution from 28.5m to 100 m and 500 m.
In my map file has 3 layer [landsat285], [landsat100] and [landsat500].
I would like to make auto select layer depend on the current zoom scale.
Then,when people see whole image area will load [landsat500],thus time
is 
reduced for processed.

Have any idea.

ArT


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