If you have followed carefully the waypoint placement, fingerprinting, and map analytics guidelines when mapping your venue, you should have been able to generate a sensor signal map that provides good positioning performance in your positioning tests. 

However, as the deployment process of the IndoorAtlas positioning service is often an iterative process, and you are learning by doing, the 'mapping quality and coverage' analytics view (see below) in MapCreator is provided to help you to detect more easily if there are remaining issues in certain areas of the map that may cause positioning performance problems. 

Note: The 'mapping quality and coverage' analytics view is mainly based on the quality of the magnetic field data provided by the digital magnetometer of the fingerprinting device. This is why we may use the term 'magnetic mapping quality' interchangeably with the 'mapping quality and coverage'.

The 'mapping quality and coverage' analytics view shows in RED color the map areas whose fingerprinting data is in conflict with itself, i.e., the overlapping/nearby fingerprinting data in these areas do not match. 

The GREEN color in the 'mapping quality and coverage'  view indicates that the overlapping fingerprinting data matches well, and the BLUE color indicates areas where no overlapping data is available for analytics, i.e., you don't have multiple fingerprinting paths close to each other on blue areas.

If there are major RED areas visible on the 'mapping quality and coverage' analytics view, you should try to fix them as they indicate possible fingerprinting errors. 

Note: small patches of RED color are normal and do not require further action.

Fixing mapping quality issues

A major red area indicates that some of the fingerprinting paths in that area may be faulty. In the Mapping paths

view in the IndoorAtlas web tool at app.indooratlas.com, you can select individual paths by clicking on them on the map or the list in the left-hand-side panel. This shows a 2D projection of the magnetic field measurements along the path on top of the floor plan image (currently only for paths included in the latest generated map). By checking the magnetic fields of nearby paths you can identify which path(s) caused the issue and disable them. If for example a path has been marked the wrong way, the magnetic field vectors may point to completely different directions than in other paths. Note that on average the Earth's magnetic field points north.

You can try the following measures to fix the mapping quality issues:

• Disable fingerprinting paths on RED areas. You can select paths by clicking them on the floor plan at app.indooratlas.com
• Ensure that the waypoints are accurately placed, i.e., their locations on the floor plan match the physical locations where you checked in on them. Adjust the waypoints on the floor plan if needed
• Record new fingerprinting paths with MapCreator to replace the disabled ones. Ensure you check in accurately to the waypoints while fingerprinting and remember to keep to phone pointing in the direction of your walk. Collect enough fingerprinting paths for high-quality maps and analytics
• Check the mapping quality analytics in MapCreator or at app.indooratlas.com to verify that the issues have been fixed. Repeat the above measures if needed
• When everything looks good, generate a new map revision.