Mapping Quality analytics describes how accurately nearby paths have been collected, that is, to which degree signals from the paths match.

This analytics overlay is the most useful when learning fingerprinting. Red color in the analytic gives an indication if any areas might have mapping errors such as

  • Inaccurate placement of waypoints --> check this guide
  • Inaccuracy of check-ins
  • Phone not pointing exactly forward while mapping (same direction as your body)
  • Path walked to wrong direction while recording
  • Too few mapping paths on some area

Interpreting colors:

  • Red indicates a problem in your mapping technique. Please refer to the instructions in the Recording paths on correct phone orientation and Waypoint usage.
  • Blue color means that there are no overlapping data in the area and thus mapping quality cannot be validated. When you master fingerprinting, most of the time you should see only blue and green on your maps.
  • Individual red points here and there are not alarming.

Blue color in Mapping Quality analytic is ok. You don't need to cover all areas with overlapping paths. Rule of thumb: if all you see is green and blue, the quality is high. 

Fixing Mapping Quality

To fix mapping quality:

1. Identify the red area and disable the paths from that area. Note that you can select paths by clicking on the map. The selected path is highlighted in red. In this example, you clearly see the selected path is causing the problem, as the non-green area exactly matches the length of this path.

2. Make sure all way points have been accurately placed and adjust where necessary. 

3. Record new paths on the area, remember to check-in accurately on the Waypoints.

4. Verify from MapCreator or from that the area is green.