Preferences: Computed Values

These section describes, how different values are computed and how it can be customized.

The visualization of the used algorithm makes it more transparent to understand how these computed values are generated.

Compute Elevation Gain

A new algorithm is used since version 9.08 to compute the elevation gain of a tour.

The new algorithm is searching the tour from start to the end for changes from an ascending to a descending part and vice versa. When a change occures and the altitude difference of this segment is equal or greater than the Mimimum Altitude Difference, the elevation gain of this segment is added to the evaluation gain of the tour, if not it will be ignored.

The value which is added to the evaluation gain is not the difference between the start and end altitude of the segment, it is the maximum altitude difference of the segment.

Button: Compute Elevation Gain for all Tours...

To modify the elevation gain for all existing tours, this button will compute the elevation gain for all tours with the selected minimum altitude difference.

The elevation gain for a single tour can be set and saved in the tour segmenter.

When is the elevation gain computed?

This algorithm and the Minimum Altitude Difference is used (and overwrites a previous value) to compute the elevation gain when

• a tour is imported
• a tour is modified in the tour editor or in the modify altitude dialog

Compute Elevation Gain

Compute Speed for GPS devices

This customization is only used for the speed computation of GPS, none GPS devices are using a different algorithm because they have a constant time interval to record the data.

All other essential information is displayed directly in the dialog.

Button: Compute max Speed for all Tours...

The max speed of a tour is saved in the database to display them quickly in different views. This value depends on the selected Speed Time Slice  because it influences the max speed of a tour.

With this button the max speed can be computed for all tours with the selected Speed Time Slice value.

Compute Speed