Bruno,
The
Itasca demo is actually based on Itasca County Minnesota.
The
data is in the projection UTM Zone 15 (north). The epsg code is
26915.
The
units for UTM are meters. In UTM, there is a Northing value measured from
the equator and an Easting value measured from a central meridian. A
'false easting' of 500,000 meters is applied to ensure that all values are
positive.
Do a
Google on UTM projections for more info.
David.
-----Original Message-----Hi,
From: UMN MapServer Users List [mailto:[EMAIL PROTECTED] On Behalf Of Bruno Patini Furtado
Sent: Thursday, August 03, 2006 2:33 PM
To: [email protected]
Subject: [UMN_MAPSERVER-USERS] Demo, Itasca coordinate system
I'm a bit confused with the EXTENT property of the mapfile of MapServer Demo, the one that shows the Itasca village (http://en.wikipedia.org/wiki/Itasca%2C_Illinois ). As it's possible to see on wikipedia page the coordinates of this place are 41.974678, -88.018513, being the X a negative number, as it's expected to all the USA country.
My question is: Why the EXTENT has two points of whose X coordinates on both are positive numbers? Which coordinate system is being used?
Thanks for your time.
--
"Minds are like parachutes, they work best when open."
Bruno Patini Furtado
Software Developer
webpage: http://bpfurtado.net
software development blog: http://bpfurtado.livejournal.com
