Coordinate Conversion

[Burgholzer,Robert]

Ian,
I interpreted your question a little differently than the other respondents, so, let me see if I understand your aim correctly, that is, 
1) to have the option of displaying your map re-projected to other coordinate systems, OR
2) to be able to display the numeric values for the center and extents of the maps

These are somewhat different aims, so if your aim is the 2nd option, then the code that Andy gave will do what you need.  If you simply want to have an alternate projection, then you can just set the projection of your map to the desired projection using the mapscript function setProjection(string proj_params, boolean bSetUnitsAndExtents), and mapserver should automatically re-project for you (provided that each of your layers has its projection specified).  You can find the documentation for this function in the phpMapscript/mapObj documentation on the mapserver web site.

Good luck,
r.b.

-----Original Message-----
From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of Ian Tidy
Sent: Sunday, June 10, 2007 9:13 PM
To: MAPSERVER-USERS at LISTS.UMN.EDU
Subject: [UMN_MAPSERVER-USERS] Coordinate Conversion

Hi, 
I need some help with a small enhancement to my MapServer site.  I have been asked to display the map extents and centre in other coordinate systems.  Currently the map window returns NZMG co-ordinates, I have been asked to supply these coordinates in NZTM, WGS84, and a few others.
I am using MapServer 4.6, MapScript and PHP on a Linux Server. 
Is there a MapScript function that will convert between coordinate systems or is there another way of doing this? 
Cheers Ian 
______________________
Ian Tidy
GIS Analyst / Developer
Works Asset Department
Napier City Council
Hastings St, Private Bag 6010, Napier, New Zealand
Phone +64-6-835-7579 Ext. 8115
Fax +64-6-834-4195
mailto:iant at napier.govt.nz
http://www.napier.govt.nz | http://maps.napier.govt.nz 


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