I’ve been experimenting with drawing “geophylogenies” on web maps and have created a live demo at http://iphylo.org/~rpage/geojson-phylogeny-demo/ All a bit crude, but the idea is to take either a NEXUS tree file with added geographical coordinates, or query the BOLD database of DNA barcodes (most of which are geotagged) and create an interactive phylogeny on a map. The demo uses OpenStreeMap, I’ve code for Google Maps as well (hope to add this to the demo shortly). The layout borrows from GenGIS (see http://dx.doi.org/10.1101/gr.095612.109 and http://kiwi.cs.dal.ca/GenGIS/Main_Page ) but doesn’t need a standalone program. There are some other advantages to using GeoJSON, such as storage in document databases like CouchDB, but I’ll blog about these.
To give you a sense of the visualisation, below is the classic Banza example that I used in 2007 when I started playing with trees on Google Earth http://iphylo.blogspot.co.uk/2007/06/google-earth-phylogenies.html, inspired by Bill Piel’s pioneering experiments.