These .dat files contain the ground truth positions for each image location as an X, Y, Z position.

The coordinate frame is set up as follows: X axis coincides with the principal
axis of the images (into the image), Y axis goes right, Z axis up.

Measurements are in centimetres, accuracy is +/- 1 mm. 

Coordinates are written in columns, with this order in the .dat files for each session as follows: 
#X #Y #Z
