The Mathematica Journal
Volume 9, Issue 2


In This Issue
Tricks of the Trade
In and Out
Trott's Corner
New Products
New Publications
News Bulletins
New Resources

Download This Issue 

About the Journal
Editorial Policy
Back Issues
Contact Information

Updating a Geographic Database

A Rubber-Sheet Adjustment Algorithm

Leendert van Gastel
Harry Uitermark

A rubber-sheet algorithm for warping is used to update a geographic database without altering points that are already known in the database. Mathematica allows a quick experimental validation of the theory and of existing FORTRAN legacy code.






  *Rubber-Sheet Adjustment

  *The Similarity Transformation

  *The Covariance Matrix

  *Mathematical Background



  *Another Basis

  *Visualizing Results



About the Authors
Leendert van Gastel is a consultant specializing in the use of ICT in science and mathematics. He has been working with Mathematica since 1992, both in applied research and training.

Harry Uitermark is a GIS consultant. Currently his research interests include geographic information, ontologies, and XML Schema, a web standard for describing the structure and semantics of XML documents.

Harry Uitermark
Kadaster, Box 9046
Apeldoorn 7300 GH, The Netherlands

About Mathematica | Download Mathematica Player
Copyright © Wolfram Media, Inc. All rights reserved.