SafeWalk Demo
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Transcript of SafeWalk Demo
![Page 1: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/1.jpg)
SafeWalk
Find your safest route for any time of day
Nishan Mann
![Page 2: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/2.jpg)
Data Sources and Pipeline
NYC Open DataMajor Crimes
Dataset2005-2016
(~1,000,000)
![Page 3: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/3.jpg)
Algorithms
● Dijkstra Algorithm: between Start and End, find the shortest path minimizing sum of weigths
● K-nearest neighbours classification to associate each crime with a road
d1
d4
d5
d2
d9
d3 d
6
d8
d10
d12
d7
d11
Start
End
![Page 4: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/4.jpg)
Cost Model for Road Lengths
Personal fear of crime Crime Costs depending on hour and type of crime
● De Sota Road, NY at 0300
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App Landing Page
● Personal Fear of Crime: Rational, Almost Rational, Borderline Rational-Irrational, Irrational, Extreme
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Brooklyn Safe Route at 0200
● Crime Avoidance Level : Vigilant, Personal Fear of Crime: Borderline Rational-Irrational
![Page 7: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/7.jpg)
Cost Model Validation (3rd Party)
● Courtesy of Trulia https://www.trulia.com/local/new-york-ny/tiles:1|points:0_crime
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Personal Fear of Crime: Rational
● Crime Avoidance Level: Vigilant
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Personal Fear of Crime: Extreme
● Crime Avoidance Level: Vigilant
![Page 10: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/10.jpg)
About Me
● Physicist studying solitons in photonic crystal waveguides
● Motorcycle enthusiast
![Page 11: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/11.jpg)
Cost Model Validation Brooklyn 0200
![Page 12: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/12.jpg)
Personal Fear of Crime
● Personal fear of crime affects each route slightly differently but there exists some saturation point
![Page 13: SafeWalk Demo](https://reader031.fdocuments.net/reader031/viewer/2022030308/58ed99441a28ab73768b46f5/html5/thumbnails/13.jpg)
Safety Rating
● approximates probability of experiencing no crime on route
● Probablity of crime on road i.● Assume crimes on each road are
independent