Lab 4 - GeoJSON & D3.js

this lab shows how to use the D3.js library to display GeoJSON data on a static map.

Q1: Montreal.
Q2:it contain the location of width and height like vector.
var svg ="#contents")
.attr("width", width)
.attr("height", height)
Q3: it is equivalently longitude.The American is about 70 west longitudeto 120 longitude.
Q4: it should add a class which define the underlined label.