The heat map, which shows up in a lighter colour, shows the tracks used by wearers of fitness devices like Fitbit.

The Global Heat Map, published by the GPS tracking company Strava, uses satellite information to map the location and movements of subscribers to the company's fitness service over a two-year period by illuminating areas of activity.

Strava says it has 27 million users around the world, including people who own widely available fitness devices such as Fitbit, Jawbone and Vitofit, as well as people who subscribe directly to its mobile phone application.

Katherine and Tindal RAAF Base also has many Fitbit users.

The Strava map show it is popular to run along the fence line at Tindal.

In Katherine, most users use the streets and river track to exercise on although publication of the map poses some global security considerations.

Australia’s Department of Defence said it was aware of the possible risks of the collection of location data through personal electronic devices and applications.

“The circumstances of this application do not constitute a security breach,” defence said.

“All Defence personnel are required to complete annual mandatory security training which includes information on the risks posed by internet-connected devices and online activities. Defence personnel are advised to actively use and manage privacy controls to limit the amount of information they make publicly available and report any suspicious online activities or contacts. Defence also provides regular personal security awareness information to personnel.

“On operations, the online presence of ADF personnel and their use of electronic devices is managed in accordance with operational security requirements developed for each activity. Personnel are advised of pertinent restrictions as part of their force preparation and arrival in theatre.”