Laurence, it's a tough problem. See the following links: http://en.wikipedia.org/wiki/Automatic_label_placement http://www.szoraster.com/Cartography/PracticalExperience.htm http://www.eecs.harvard.edu/~shieber/Projects/Carto/carto.html http://i11www.iti.uni-karlsruhe.de/map-labeling/bibliography/
I've got some R code enclosed that uses simulated annealing or genetic algorithms to find suitable locations. The code is granted to the public domain. The genetic algorithm portion is adapted from the python code here: http://meta.wikimedia.org/wiki/Map_generator I thought I had posted this to r-sig-geo before, but I couldn't find it. Anyway, I've only lightly tested it, and it could probably be tweaked more. - Tom Tom Short Electric Power Research Institute (EPRI) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Laurence Amilhat Sent: Wednesday, June 06, 2007 10:27 AM To: r-sig-geo@stat.math.ethz.ch Subject: [R-sig-Geo] spread labels, plotrix package Hello, I am using the plotrix package to add labels on my plot (a map exactly). But when I have a lot of points, the labels are overlapping, Do you know how can I avoid the labels overlap? I am using the spread.labels, I tried thigmophobe.labels and boxed.labels with no better results. Any idea are welcome, Thank you, laurence -- ==================================================================== = Laurence Amilhat INRA Toulouse 31326 Castanet-Tolosan = = Tel: 33 5 61 28 53 34 Email: [EMAIL PROTECTED] = _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
PointLabelSANNandGA.R
Description: PointLabelSANNandGA.R
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