Shadowtrack and mapping

Mapping calculates the relation of the device's coordinates to the shadowtrack of the tracking map.

Shadowtrack

The shadowtrack enables calculations for the visualization of the race (elevation chart, statistics), predictive tracking and for add-ons such as leaderboard and monitor.

Only one track can be set as the shadowtrack of the event. The shadowtrack represents the route on which participants move from the start to the finish. The length of the shadowtrack has to be the same length as the contest.

• The length of the shadowtrack for a marathon is 42.195 km.

• The shadowtrack for a triathlon includes swimming, cycling, and running in one continuous line.

• If participants have to run three laps, then the shadowtrack has to consider three laps, too.

What is mapping?

Mapping processes the relation of the device's coordinates to the shadowtrack by calculating metrics like distance from start or distance to go. This impacts various features, including:

• Visualization and elevation chart,

• Leaderboard,

• Monitor,

• Ranks API and

• Current API.

Note that mapping does not impact predictive tracking.

How does mapping work?

GPS devices send their coordinates to the tracking map and Racemap automatically calculates the most likely position on the shadowtrack.

The mapping can begin at any point on the shadowtrack. The first coordinate of the device must not necessarily be mapped to the start of the track. The first coordinate is mapped to the closest position on the track without a speed filter.

Mapping takes into account the device's latest coordinate and its previous position on the track.

Mapping considers laps and assumes that a device moves onwards (and not backward) on the track.

In the advanced section of your tracking map you can set the below parameters to filter the device's coordinates for the mapping.

• Max mapping distance (in meters): Maximum distance of devices coordinates from the shadowtrack. Coordinates with a greater distance from the shadowtrack are not considered for the mapping.

• Max speed for speedfilter: Maximum speed to consider the devices coordinates for the mapping on the shadowtrack. Coordinates that would need a greater speed are not considered for the mapping.

• Min speed for speedfilter: Minimum speed to consider the devices coordinates for the mapping on the shadowtrack. Coordinates that would need a lower speed are not considered for the mapping.