Simon Willison’s Weblog

Cartographer.js. “Thematic mapping for Google Maps”—which means an easy way of adding heat maps (aka chloropleths), pie charts and point clusters as a layer over a Google map.

# 1st November 2009, 1:20 pm / catography, chloropleths, google, google-maps, graphs, heatmaps, infographics, mapping, maps, piecharts, visualisation

Oakland crime maps XI: how close, and how bad? Michal Migurski’s experiments with heat maps for Oakland Crimespotting, using OpenStreetMap data as that allows him to position his heat map layer underneath the street labels, keeping them legible.

# 30th December 2008, 10:16 am / heatmaps, mapping, michal-migurski, oaklandcrimespotting, openstreetmap

HeatMapAPI (via) Cool (or should that be hot?) API for adding heat maps to any Google Maps application.

# 19th July 2008, 11:46 pm / google-maps, heatmaps, mapping