Dragonfly does not provide a reliability index. When calling the GET Status API function, Dragonfly provides the information you find in the table at the previous link, including:

• STATE of the positioning algorithm that can be:
  • NAVIGATION – if Dragonfly is providing a position.
  • LOST – if Dragonfly is not providing a position for some reason (e.g. the features in front of the camera do not match the features within the previously created map).
• FPS – frames per second (function of the lighting conditions and the power of the underlying architecture).
• LATITUDE/LONGITUDE/ALTITUDE – the location and altitude of the camera.

In the previous months we studied the possibility to create a reliability index function of some of the data made available by the algorithm (e.g. like the number of features detected by the camera) but this did not lead to a good reliability index.

What we can say is that: if the setup procedures have been performed carefully (calibration of the camera, mapping and geo-referencing process) then, when Dragonfly provides a location, it is possible to rely the fact that the location falls within a specific confidence radius with respect to the real location of the camera. The confidence radius can be computed in a test phase by sampling the coordinates provided by Dragonfly and comparing them with the coordinates of the positions collected inside a DWG of the area.

More information about the accuracy can be found inside this knowledge base article.