FitBit has a heatmap that shows where FitBit wearers are walking most. You can see what parts of your city are most walkable, and even spot secret military bases in the data. :
Fitness app Strava lights up staff at military bases - BBC News
US military reviewing security practices after fitness app reveals sensitive info | CNN Politics
Pentagon Reviews GPS Policies After Soldiers' Strava Tracks Are Seemingly Exposed : The Two-Way : NPR
Secret US bases inadvertently revealed on fitness-tracking map
Heatmap” for social athlete's app reveals secret bases, secret places | Ars Technica
Fitness tracking app Strava gives away location of secret US army bases | GPS | The Guardian
Strava map dangers: Strava fitness map, Strava heat map Area 51 reveal
Strava has published details about secret military bases, and an Australian was the first to know - ABC News
Strava launches new Global Heatmap based on 1 billion activities | road.cc
Fitness app Strava lights up staff at military bases - BBC News
Strava Fitness App's Global Heatmap Reveals Sensitive Locations – Westoahu Cybersecurity
U.S. soldiers are revealing sensitive and dangerous information by jogging | The Seattle Times
Fitness Tracker Data Highlights Sprawling U.S. Footprint in Africa
How a Fitness App's Heat Map Uncovers Military Bases | NYT - YouTube
Experts Say Fitness Tracker Map Reveals Secret Military Bases
Global fitness tracker data exposes IoT policy gap - FCW
Strava fitness tracking map reveals military bases, movements in war zones
Heat Map Released by Fitness Tracker Reveals Location of Secret Military Bases
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Strava's fitness tracker heat map reveals the location of military bases - The Verge
Strava Data Heat Maps Expose Military Base Locations Around the World | WIRED
Fitness Tracker Data Highlights Sprawling U.S. Footprint in Africa
If You Can't Take the Heat Map: Benefits & Risks of Releasing Location Datasets - Future of Privacy Forum
Tracking Cardiovascular Health Population Trends Using Consumer Wearables | DAIC
Google Maps chart options | Looker | Google Cloud
