IBM IoT for Automotive: What does value '-1000' returned from some Vehicle APIs as 'heading', 'altitude', etc.?

Question

Why does the value -1000 get returned from some Vehicle APIs as heading, altitude, etc.?

For example:

The following parameters/values are returned after sending get event information (/event) from the REST API.

The value of altitude and 'heading' is -1000. What does -1000 mean?

   {"contents":[{"event_time":.....,"e_altitude":-1000.0,.....,"heading":-1000.0,...}]}

Answer 1

Those values mean that null is actually set to the field rather than -1000.

IoT for Automotive will update the APIs so that its behavior becomes more clear in the future release, like setting null to those fields in the response.