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Interested in hacking on crashmapper and/or the nypd crash data bandaid? These are some outstanding tasks:

Low-hanging fruit

  • (RESOLVED) e766e46 Mobile block, to advise people against trying to load the map on their cell phones.
  • A clearer disclaimer/link to licensing info.
  • (RESOLVED) 0507c49 Determine end date from loaded data instead of hardcoding it.
  • Explanation in docs of how to read popup layout.
  • Help in-popup to see what it means.
  • Better icons for single intersections/incidents.


  • (RESOLVED) b6c787b Investigate GH issue #1, and see whether the Excel input script is sometimes dropping certain stats from intersections.
  • (RESOLVED) d771a9e Memory profile and fix leaks, particularly in FF.
  • (RESOLVED) d6cb4c7 Fix bug that could cause empty popups to display.
  • Panning across the map after an overlay change doesn't always refresh data properly.

Significant new features

  • (RESOLVED) a5e4a19 Allowing the selection of a date range, aggregating stats within.
  • (RESOLVED) 398fd23 Allow for a date range to be dragged in its entirety, rather than just one edge.
  • Providing an interface to view the vehicle type and contributing factor overlays. The data's already loaded in.
  • (RESOLVED) 3a11c1e Display a color-coded legend.
  • Location box to quickly jump to a specific address.
  • Allow custom aggregation based off of a drawn shape.
    • Provide some useful pre-made shapes (council districts, CDs, boroughs, etc.)
  • Allow automatic zoom-to-area.
  • (RESOLVED) 4f40b81 Provide interface to change "volume" of data.
  • Allow for quick back-and-forth switches between different views (for example, to compare two different time spans.)
  • Use NYC Geocoder instead of Google
  • Allow search for specific intersection based off characteristics (at least X collisions with injuries, etc.)

Infrastructural changes

  • Tests (!)
  • (RESOLVED) 35af1635 Implement staging server and nonbreaking push of new features from it.
  • (RESOLVED) bc8dde4b Change crashmapper JS namespace from Letsmap to Crashmapper.
  • Possibly refactor crashmapper entirely out of the band-aid (dependencies are limited to the data transfer.)
  • Investigate ways to break the data set into several requests while keeping it responsive.
    • Perhaps load the lon/lat data as an array alongside a simple array of the currently displayed overlay? Two smaller requests instead of one, still provides immediate zoom/time scan response. A third request could be point-in-time for all data dimensions, for providing readout on popup.


  • Mobile support.
  • Other cities.
  • Complementary data sets (traffic counts, NYS collision data.)
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