Add: census block interactions on Google Maps
Normalize interaction weights; dynamic opacity
Dynamic initial zoom level for Google Maps

Use the place bounding box from the configuration file to determine the
zoom level and center coordinates for the Google Maps display, rather
than using hard-coded values.
Display place bounding box on map
Use map.fitBounds instead of calculating zoom
Dynamically fit map to show the interacted blocks

Idea from:

http://salman-w.blogspot.com/2011/03/zoom-to-fit-all-markers-on-google-map.html