Input data for maps is
geoJson format. D3.js works very
well to display this kind of information using
The most basic bubble map you can do in d3.js. Keeping only
the core code.
A clean template based on my #surf project. I harvested tweet containing the #surf hashtag for ~ 1 year and geocoded people home location. Here is where the surfers live! You can read more about this project here.See code
Leaflet.js open source library
A few blocks with more complicated codes to showcase the possibility