(require("compute/makeGeography/makeCensus"))() → {Array.<Array.<Array.<number>>>}
What fraction of each tract lives in each district?
Return an array indexed by district.
Each element contains an array of pairs.
The first of the pair is a tract's pair of coordinates.
The second of the pair is the fraction of the tract within that district.
Returns:
- an array of districts,
each with a list of census tract properties [x,y,overlap]
- Type
- Array.<Array.<Array.<number>>>