Cartograms, self-organizing maps, and magnification control

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper presents a simple way to compensate the magnification effect of Self-Organizing Maps (SOM) when creating cartograms using Carto-SOM. It starts with a brief explanation of what a cartogram is, how it can be used, and what sort of metrics can be used to assess its quality. The methodology for creating a cartogram with a SOM is then presented together with an explanation of how the magnification effect can be compensated in this case by pre-processing the data. Examples of cartograms produced with this method are given, concluding that Self-Organizing Maps can be used to produce high quality cartograms, even using only standard software implemen-tations of SOM.

Original languageEnglish
Title of host publicationAdvances in Self-Organizing Maps
Subtitle of host publication7th International Workshop, WSOM 2009, St. Augustine, FL, USA, June 8-10, 2009. Proceedings
EditorsJosé C. Príncipe, Risto Miikkulainen
Number of pages9
ISBN (Electronic)978-3-642-02397-2
ISBN (Print)978-3-642-02396-5
Publication statusPublished - 27 Aug 2009
Event7th International Workshop on Self-Organizing Maps, WSOM 2009 - St. Augustine, FL, United States
Duration: 8 Jun 200910 Jun 2009

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume5629 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference7th International Workshop on Self-Organizing Maps, WSOM 2009
Country/TerritoryUnited States
CitySt. Augustine, FL


  • Cartograms
  • Magnification effect
  • Self-organizing maps


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