This is a choropleth map of the City of Chicago highlighting the concentration of noise complaints in each of Chicago's neighborhoods from October 30th 2013 until October 30th 2016. Data on noise complaints was gathered from the [City of Chicago's Data Portal] (https://data.cityofchicago.org/). The geoJSON file used for the cities neighborhood boundaries can be found here.
Ruby 2.2.5
Rails 5
PostgreSQL 9.2 or later with PostGIS 2.0 or later
RGeo 0.4.0
ActiveRecord-PostGIS-Adapter
RGeo-geoJSON
Leaflet.js