Re: Warping surfaces to match control points

["Dick Jackson" <dick(at)d-jackson.com>]

"Brad Nelson" <brad.nelson@nrc.ca> wrote in message
4e53fd15.0107050552.1442c0ea@posting.google.com">news:4e53fd15.0107050552.1442c0ea@posting.google.com...
> I purchased a magnetic field grid which was generated from poor
> navigation data. When we flew through the area again and measured the
> magnetic field, many of the anomalies were displaced by km.  Does
> anyone have an IDL procedure for warping an existing image (my grid
> data) to a set of control points (my flight measurements). All of the
> warping programs that I have seen rely on two images and a few "this
> pixel should be over here" control points.  Nowhere have I found an
> algorithm that takes many points and matches features.  Any
> suggestions?

I haven't used it before, but from the online help, I think WARP_TRI may be
just what you're looking for.

Cheers,

--

-Dick

Dick Jackson / dick@d-jackson.com

D-Jackson Software Consulting / http://www.d-jackson.com

Calgary, Alberta, Canada