Message-ID: <3ED65B8E.7050703@sentoo.sn>
Date: 2003-05-29T19:12:14Z
From: Renaud Lancelot
Subject: surfaces and digital terrain model
Dear all,
I have computed a digital terrain model from a set of points (x, y, z)
using the function interp() in package akima. I want to predict flooded
surfaces given target values of z. I can display the flooded surfaces
with contour() or image(), but I don't know how to get the polygons
delimiting the surfaces. Did anyone write a function for this purpose ?
Best regards,
Renaud
--
Dr Renaud Lancelot, v?t?rinaire
CIRAD, D?partement Elevage et M?decine V?t?rinaire (CIRAD-Emvt)
Programme Productions Animales
http://www.cirad.fr/presentation/programmes/prod-ani.shtml
ISRA-LNERV tel (221) 832 49 02
BP 2057 Dakar-Hann fax (221) 821 18 79 (CIRAD)
Senegal e-mail renaud.lancelot at cirad.fr