07-25-2019, 05:05 PM
A little update about the fix:
I have tested the new formula by comparing with the odometer of my car over 50km and they agreed to within 3%, which I attribute to using the average earth's radius in our formula instead of the actual geoid elevation.
Unfortunately, Apple has rejected the update because they came around to read the GPS experiment description and objected to our explanation on how Android and iOS give slightly different information (the text has been there for ages and is even slightly outdated, but maybe they came across this because our release notes now mention GPS). Therefore it will take a few more days until this is settled, although we might release the Android version sooner without waiting for Apple.
By the way, the disputed info is actually rather relevant to this thread:
Since version 1.1.0 we include all the location data in the GPS experiment, which not only includes satellite data, but mobile and wifi-based location as well. Since these data points are less accurate, they may increase the calculated distance further, so you may want to enable the setting "only use satellite data" in the experiment's menu. This is not possible on iOS though (and we might not even be allowed to inform iOS users about this problem in the future).
I have tested the new formula by comparing with the odometer of my car over 50km and they agreed to within 3%, which I attribute to using the average earth's radius in our formula instead of the actual geoid elevation.
Unfortunately, Apple has rejected the update because they came around to read the GPS experiment description and objected to our explanation on how Android and iOS give slightly different information (the text has been there for ages and is even slightly outdated, but maybe they came across this because our release notes now mention GPS). Therefore it will take a few more days until this is settled, although we might release the Android version sooner without waiting for Apple.
By the way, the disputed info is actually rather relevant to this thread:
Since version 1.1.0 we include all the location data in the GPS experiment, which not only includes satellite data, but mobile and wifi-based location as well. Since these data points are less accurate, they may increase the calculated distance further, so you may want to enable the setting "only use satellite data" in the experiment's menu. This is not possible on iOS though (and we might not even be allowed to inform iOS users about this problem in the future).