Notes for March 9

We have a new import at the top of the file: TopoJSON
TopoJSON provides a helpful framework for storing, loading, and displaying topographical data. Check out its data specification.

More on d3.geo and its geographic projections.

Today's data (both geoJSON and CSV) comes from the DataSF municipal open data initiative. I used mapShaper to convert the geoJSON file into a topoJSON file, which is much smaller.

HTML for today:
Code for today: