Historical information

The rollers move over the map as the tracing arm is used to follow the boundary to be measured.
The wheels allow unlimited horizontal travel and vertical travel within the limits of the arm movement. They measure in the X and Y directions
Reading from the digital scale the area in square centimetres could be measured.
Knowing the scale of the mapsheet the figure was converted to areas or hectares
Generally at least three measurements were taken to ensure accuracy and precision

Physical description

Planimeter used to measure areas from scale maps.
Includes box but no charger

Inscriptions & markings

Plancom KP90