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How do I plot contours from measurements taken on a rectangular 2D lattice ?

• To: mathgroup at smc.vnet.net
• Subject: [mg50371] How do I plot contours from measurements taken on a rectangular 2D lattice ?
• From: "mrksr. dmn. co. uk" <daniel at marksr.demon.co.uk>
• Date: Tue, 31 Aug 2004 06:28:36 -0400 (EDT)
• Reply-to: "mrksr.dmn.co.uk" <marksr.demon.co.uk at marksr.demon.co.uk>
• Sender: owner-wri-mathgroup at wolfram.com

Hello, I am new to this newsgroup.
I will shortly have an array of 40 x 41 = 1640 height measurements on 
some undulating land, taken at 1 metre intervals on a square grid. Each 
measurement has an error of about 5%.
How do I display the data as smooth interpolated height contours ?
-- 
Daniel Marks