Xamarin Essentials Location Real Time Accuracy:

Lew Carlson 1

Newer Phones with Dual Frequency GNSS/GPS may provide better horizontal location with GPS only. This maybe achieved with controls on the phone. With out going to "GPS only" a "strange" location seem to be returned every some number of seconds (6 - 7 in my Testing using Best Accuracy), otherwise the location is solid. This is at a static location with clear view to sky. But when moving from this spot the returned location values do not change until a large distance 20+ yds or more have been traversed.

I know altitude maybe an issue with "GPS only" but altitude from other sources with out using their horizontal location may be a possible solution.

There seem to be some threshold before a new value is returned. My App needs real time position as a person walks. I know this is possible as I see this with an App like "GPSTest". Is there a way to allow the override of this threshold, or if it's not a threshold, get a more real time location?

Leon Lu (Shanghai Wicresoft Co,.Ltd.) 68,656 Reputation points Microsoft Vendor

2021-04-22T06:00:34.783+00:00
You can set GeolocationAccuracy.Best. For iOS you can get the real time accuray, For Android, you can check the source code about Xamarin.Essentials: Geolocation
You can re-write PlatformLocationAsync method, get the location data just from GPS( you can see the line 66 in source code, it add NetworkProvider )

And you can re-write GetBestProvider, it set accuracyDistance = 50, you can set it to smaller value.

case GeolocationAccuracy.Best: criteria.Accuracy = Accuracy.Fine; criteria.HorizontalAccuracy = Accuracy.High; criteria.PowerRequirement = LocationPower.High; accuracyDistance = 50;

https://github.com/xamarin/Essentials/blob/main/Xamarin.Essentials/Geolocation/Geolocation.android.cs
GPS58 1 Reputation point

2022-09-21T10:30:48.503+00:00

It is possible to make an override of GetBestProvider or it's neccessary download source, modify the GeoLocation class and recompile? Thank you.