*Make '''hcllayer''' 163887: Aggregate to the layer level calculating nosingleton, nomultiton, etc., as well as tothullarea etc.
Note that everything uses Geographies (except to find centroids), and pair lengths and hull areas are scaled so that they are in hm and hectares (hm2) [https://en.wikipedia.org/wiki/Hectometre], as this is close to being a city block length and square block [https://en.wikipedia.org/wiki/City_block#Grid_plan] at least in Houston, TX (note that a block in Chicago is 2 Houston blocks and there is no standard block definition).
===Other===