Display simple analytics

[juliekdang]

On buffer result:

• population within buffer
• % of DC land area within buffer
• number / % of residential properties within buffer

[sara4844]

I am working on researching data and geojson files related to Montgomery county

[alongthepike]

% of DC land within buffer should be a straightforward call to turf-area.

[alongthepike]

Population within buffer can probably be accomplished by pulling a GeoJSON of population by census block group and checking each block group polygon against the buffer with (turf-intersect)[http://turfjs.org/docs/#intersect] If they DO intersect, then that means some portion of that block group is within the buffer and its population should be counted in some way (either naively - if any part touches then we consider the whole block group within the buffer or try to get fancy at look at the % of the geographic area of the block group that intersects and count that % of the population).

[alongthepike]

Depending on how these perform they may have to be pre-computed beforehand and stored for display or we may be able to just run turf in the browser.