[Mapserver-users] Projection Systems question
ed at topozone.com
Fri Jan 30 21:52:28 EST 2004
Thanks for looking into this - I'll try to reproduce the problem and
take a look.
President and Chief Mapmaker
From: David Fawcett [mailto:David.Fawcett at state.mn.us]
Sent: Friday, January 30, 2004 6:05 PM
To: David.Fawcett at state.mn.us
Cc: abehere at cs.ucsd.edu; mapserver-users at lists.gis.umn.edu;
amitbehere at rediffmail.com
Subject: RE: [Mapserver-users] Projection Systems question
I played with the data and the mapfile. I was able to reproduce what
Amit was seeing, and display all of the points in the .shp. I figured
out how to control the issue, but I am not sure of the root cause.
I modified the MAP file to improve symbology and add a label. When I
called the map using URL
one point displays, with a label, it is identified as TREEID 431 which
is locate in the south west region of the extent. This isn't what I
expected to see, but it reproduces what Amit was seeing. The point
wasn't noise, but an actual point from the .shp.
When I added a MINSCALE of 1000000to the WEB object, I can see all of
the points in the shp.
I therefore assume that there is some issue with the extent in the MAP
file and the MINSCALE is preventing it from zooming too far.
Ed, can you shed some light on this?
I have attached images of the two conditions that I have described.
Here is the MAP file____________________________
EXTENT 385538 3761010 391329 3764477
SIZE 400 400
#MINSCALE 100000 #with this enabled, produces image with all
#MAXSCALE 15500000 #see 'with_scale_restrictions.png'
# Start of symbol definition
POINTS 1 1 END
# Start of LAYER DEFINITIONS
COLOR 255 0 51
#SHADOWCOLOR 204 204 204
END # layer ends here
END # end of map file/object
David J. Fawcett
MN Office of Environmental Assistance
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