Hi all! TL;DR Walkability is an increasingly important aspect of our lives, so my friend and I built a tool to automatically measure it. PROBLEM * Walkabili

Hi all! TL;DR Walkability is an increasingly important aspect of our lives, so my friend and I built a tool to automatically measure it. PROBLEM * Walkability is important to people [0], and the planet [1] * The existing solution, Walk Score, is flawed [2], seems to only operate as the crow-flies, and is missing key info, such as traffic safety [3] SOLUTION * My friend and I built an MVP to reflect recent academic literature [4] and provide a more detailed breakdown * It’s an MVP to see what users think. The scores still need a lot of work. EXAMPLES 1) 1000 Largo Center Dr, Largo, MD 20774, USA Link: https://walkable.us/result/1000%20Largo%20Center%20Dr,%20Lar https://walkable.us/result/1000%20Largo%20Center%20Dr,%20Lar... Image (in case site is down): https://i.imgur.com/cEik22U.png https://i.imgur.com/cEik22U.png 2) Langley Park, MD, USA Link: https://walkable.us/result/Langley%20Park,%20MD,%20USA https://walkable.us/result/Langley%20Park,%20MD,%20USA Image: https://i.imgur.com/6CiyFIa.png https://i.imgur.com/6CiyFIa.png IMPLEMENTATION We reached a 100ms single CPU response time for any location within the US with the following: * OSM data from GeoFabrik imported with imposm and pre-processed with osm4routing * Data lives in a PostGIS DB with pgrouting and post_raster extensions * Entirely route-network based walkability computation using OSM POIs, regions and edge data * We achieved high speed in general by moving as much computation as possible to PostGIS - we were blown away by this toolchain! * We use a PCA based model for the overall score, with range based breakdowns [5] * Bing building footprints helped overcome OSM data paucity issues [6] We hope you like it. Please let us know what you think! REFERENCES [0] https://www.bbc.co.uk/news/uk-england-london-56026940 https://www.bbc.co.uk/news/uk-england-london-56026940 [1] https://drawdown.org/solutions/walkable-cities/ https://drawdown.org/solutions/walkable-cities/ [2] https://www.stateofplace.co/our-blog/2016/10/does-walk-score https://www.stateofplace.co/our-blog/2016/10/does-walk-score... [3] https://www.sciencedirect.com/science/article/abs/pii/S13619 https://www.sciencedirect.com/science/article/abs/pii/S13619... [4] https://www.sciencedirect.com/science/article/pii/S209526351 https://www.sciencedirect.com/science/article/pii/S209526351... [5] https://www.semanticscholar.org/paper/A-Data-Driven-Framewor https://www.semanticscholar.org/paper/A-Data-Driven-Framewor... [6] https://www.microsoft.com/en-us/maps/building-footprints https://www.microsoft.com/en-us/maps/building-footprints