"Detections_local" is a detection's location in relation to the sensor, whereas "detections_world" is that in relation to the space.
Detections_local is the location of the detection in relation to the sensor. The origin point [0,0] is at the top left corner.
Detections_world is the location of the detection in relation to the space on Studio. The origin point [0,0] at the bottom left corner of the grid.
Detections_local always exists but our algorithm only sends detections_world when a sensor has been added to a space on Studio.