[core] Fix track length calculation to take into account the ascend/descend
The current method
organicmaps/geometry/mercator.cpp
Line 50 in 655cf0f
is only calculates a projection between points and does not consider the ascend/descend.
The true length for the track distances should be the
sqrt(projection ^ 2 + ascend ^ 2)
The general difference will not be very big but sensitive:
| Track | projection | real length |
|---|---|---|
| Track 1 | 2146 m | 2152 m |
| Track 2 | 6991 m | 7005 m |
| Track 3 | 10 002 m | 10 111 m |
| Track 4 | 6991 m | 7005 m |
| Track 5 | 8158 m | 8182 m |
| Track 6 | 15 635 m | 15 760 m |
organicmaps / organicmaps
🍃 Organic Maps is a free Android & iOS offline maps app for travelers, tourists, hikers, and cyclists. It uses crowd-sourced OpenStreetMap data and is developed with love by MapsWithMe (MapsMe) founders and our community. No ads, no tracking, no data collection, no crapware. Please donate to support the development!
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