On Wed, Apr 30, 2008 at 11:11:08AM +0200, Ivvvn SSSnchez Ortega wrote: > > On Wed, April 30, 2008 10:32, Juan Lucas Dominguez Rubio wrote: > > One funny alternative would be to compute not the size of the data > > but the size of the tiles in a compressed format. An empty tile can be > > compressed to a few bytes, but a dense tile with a lot of ways and place- > > names cannot be compressed so much. > > I don't like that. We're using a spherical mercator projection, meaning > that anything nearer the poles is drawn bigger. That fact would slant the > statistic towards northern europe.
I suppose it would be possible to correct for that, bits per unit area where area is a function of latitude (small tile approximation). Once you had derived the (normalized) information density f(theta, phi) you could then plot it (heat map) back on the original map. Cheers, -w _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
