Solutions to GPS tracking problems?

Question

satellite navigation

Approximately the radius in which we get the GPS coordinate.
The red cross is the real position of the user


Problems
1

when the user traveled 10 km between 2 points using GPS, and the time and steps counter counted several times less than

2 and 3 The


most incorrect data when the coordinate points are as close or far from each other as possible within the radius of receiving points.
Thus, the user allegedly passed many times less or more.

4


if one point is invalid for any of the reasons, that is, it is not taken into account. What sets the task, how then to count the points? After all, it is impossible to miss and at the same time it is necessary. As you can see in the figure, if you count points A and C, then this led to even worse results.

The main task is to correctly calculate the distance between points in the presence of GPS coordinates and the number of steps, because some of them are 100% invalid and there are quite a few reasons why.

Each point has such a set of data at the current moment

"latitude": 1.3386951,
        "longitude": 103.85053,
        "altitude": 25.700000762939453,
        "accuracy": 28.816999435424805,
        "altitudeAccuracy": null,
        "heading": 96.37494659423828,
        "speed": 1.30894935131073,
        "isValidForPrevPoint": true,
        "rangeStatus": "",
        "timer": {
          "hour": "00",
          "min": "13",
          "sec": "56"
        },
        "timestamp": 1599473268566,
        "steps": 998

as an example.
PLUGIN

Answer 1

Answer 2

The number of steps and positioning are generally different tasks.
I somehow thought they agreed that the step is 0.75 meters, and the exact coordinates are still through satellites

Answer 3

the accuracy of gps location is known and with certain calculations it is possible to find the accuracy of the route traveled.
what is the accuracy of human stride length?? on rough terrain?? how accurate is his route when moving from point A to B ??
the answer to these questions and similar ones will be the answer to your problem.