Compare Tours by Geo Location (GPS)

A central part of this tool is the Geo Compare result view. This view can be opened from the menu Tools/Compare Geo Tours.

Notations

Reference Tour

When doing a tour comparision, one tour or part of a tour is compared with all other tours, this tour is called Reference Tour.

Geo Part

A geo part is a geo square with the size of ~1.6 km / 1 mile or 0.01 °. A tour can have multiple geo parts, all it covers.

Start Comparison

A comparision of a geo tour can be startet by

• Select Geo Compare  Action in the Tour Chart  view and move the vertical sliders to the desired location
• Select a reference tour in the Reference Tours  view

Geo Compare by using the Tour Chart

• Select  geo compare action in the tour chart toolbar
• The geo compare view should get opened automatically
• The area between the vertical sliders has a blue translucent background color
• Move vertical sliders to the desired positions which should be compared
• After a short delay (0.5 sec) the comparison will start continuously until the vertical sliders are not being moved or the comparison is switched off in the geo compare result view

Compare Result Examples

Tour is compared with itself

The beginning of the tour is the same

Tour is in the opposite direction

How Geo Comparison Works

There are several steps

1. Find Geo Parts

Find all geo parts (tours) in the database which are covered by the reference tour. All of the found tours are displayed in the geo compare result view.

2. Compare all Time Slices

Time slices of all tours which are found in step 1, are compared with the reference tour.

This comparison is also done with several steps

• Normalize (divided) distance into segments with equal length. In the geo compare options the parameters for this comparison can be adjusted.
• Summarize all differences with the reference tour, so each time slice in the compared tour has a geo diff summary.
• The minimum of all geo diff summaries is the most likely position where a compared tour is the same as the reference tour. The geo diff summary difference is displayed in the geo compare result view and can be visualized in the compared view.

Performance

The comparision is using all available cpu cores.

Why has a tour comparison with itself not a geo diff summary of 0?

Because of the normalized distances and the time slice position where a reference tour starts.

Geo Compare Result View

No Geo Data

When a tour without geo data is selected then the this view is empty.

With Geo Data

When a geo comparison is started then this view shows the comparision results.

Header

Actions

Geo Compare Options

Compared View

The compared view shows the geo compare differences.

This views is currently (18.5) not yet fully adjusted for the geo comparison

This page is updated for version 18.5