DaSSWeb – Data Science and Statistics Webinar
Tuesday 9 November, 14:30
Speaker: Victor Lobo NOVA-Information Management School & Escola Naval
Title: Cartograms, and how to obtain them using Self-Organizing Maps and controling their Magnification Effect.
Zoom link: videoconf-colibri.zoom.us/j/84889120945
<videoconf-colibri.zoom.us/j/87373848710> Abstract: Cartograms are geographic representations where the area of each region is distorted to as to be proportional to a given variable of interest. The most common ones are population cartograms, where regions with large populations are enlarged, squeezing the regions with less population. To obtain a good cartogram, not only each regions should occupy an area proportional to the variable of interest, but at the same time the necessary distortions should allow the users to still recognize the map. Several examples of cartograms shall be given, together with the algorithms that produce them. Finally, a method based on Self-Organizing Maps, named CartoSOM will be presented, together with a recent improvement based on a better estimation of the “Magnification Effect” of the SOM.
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