What map does strava use?

Related questions

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2. What is asynchronous REST API?
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4. Does strava drain battery?
5. What is callback API?
6. What is callback URL in API?
7. What is authorization callback URL?
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Tags

1. #iphone
2. #using
3. #hosted
4. #gradually
5. #slippy
6. #openstreetmap
7. #android
8. #mapbox
9. #style
10. #terrain
11. #introducing
12. #rendered
13. #replacing
14. #strava
15. #switched
16. #google