Travelling in NYC
See http://www.triptropnyc.com/
They say “extraordinarily pretty subway maps from anywhere to everywhere in new york city”.
The author documents his technology. I wonder how hard it’d be to build a house price database
The author says
As for the programming bits, it was a rag-tag team of scripts consisting of Ruby, Python (NumPy, SciPy, matplotlib), PHP, and ImageMagick all popped onto a couple hundred EC2 instances, running computations on a few gigs of MySQL tables. Distances and image overlays were precomputed for about 128k points in NYC and then moved over to S3 for safekeeping. Web stuff is all Sinatra and (of course) Google Maps. Datawise, station-to-station commute time is from the Metropolitan Transit Authority, and walking calculations are via Manhattan distance at 3mph.
Links
Keywords: Visualisation, Geography, NYC, travel, HTML, Technology
The Mayor and GLA produced a widget to allow borough maps with a scalable index to be built.