Just found out that Strava has changed their algorithm for calculating elevation for devices without a barometer (ie iPhones etc). Looks like they have changed from using the various free digital elevation maps to creating their own database based on other riders with a barometer. I remember them talking about working on this last year and it looks like they have finally implemented it.

I just tried using the new elevation algorithm on a ride I did today. With barometer it gave 623m but with elevation correction it came down to 402m.

https://support.strava.com/hc/en-us/...s/115000024864