GPS accuracy

The gear needed for wardriving

2 posts • Page 1 of 1

Postby FredR » Sun Nov 14, 2021 3:10 pm

Hello,
when I watch the map with only my data, I can see that there are little dots in place I never went. Also some strings of points in linear alignment in odd places.
Also I have data points in the middle of a ponds.
Do you know if there is something that can be made to fix that and filter odd data ?

Postby arkasha » Sun Nov 14, 2021 9:28 pm

these issues happen because of several reasons:
1. the long lines sound like GPS issues - these are (unfortunately) common in older devices.
2. points are trilaterated - the centers of the signal are estimated according to an algorithm. Bad GPS coordinates can contribute to points being located in odd spots, as can other users observing them in conflicting places.

The short version of how to fix it:
1. observe the points from multiple places and at multiple times, and they'll snap to the right locations
2. if you discover a particular device has GPS problems, you might consider replacing it. this can be diagnosed by turning on "display routes" in the WiGLE WiFi Android app, or mapping your results before uploading with other packages!

Cheers

-a

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