[R-sig-Geo] Mapping contours from jpg map

[Barry Rowlingson]

On Fri, Jul 8, 2011 at 3:24 PM, Robert J. Hijmans <r.hijmans at gmail.com> wrote:
> For those places (valley bottoms, mountain tops), a spline interpolation do
> better ((and even better when using stream information like in Hutchinson's
> algorithm that was (is?) implemented in Arc/INFO.))

Sadly it seems that Hutchinson and ANU do not subscribe to the open
source philosophy:

http://fennerschool.anu.edu.au/publications/software/orderform-int.php

 and if he even only gets a cent on every Arc/Info license containing
ANUDEM he's probably not doing too badly...

Barry