Annex B: Determining the matrix EFA-200/-300
B-2
Organizing data
The area under investigation is traversed systematically within the spatial
limits during the measurement. Any direction can be chosen and this can be
altered at any time. A measurement value is recorded along with the
displayed coordinate value by pressing a button at each point in the space
that is of interest. These values are initially stored in a data pool. The target
coordinates for the next measurement are then calculated and displayed on
the screen.
The proposed target coordinates can be altered if required or ignored if the
proposed point is inaccessible or of no interest, for example.
Each individual measurement point is uniquely identified by means of a
sequence index N and a timestamp. This allows repeat measurements to be
made at the same point (identical coordinates but different timestamps).
All the values collected and stored during the series of measurements are
stored together in a data set only after the series of measurements has
been completed.