ground scale

The classifications may have different ground scales of generalizations, degree of inner strictness.

We judge the size of an object by direct comparison of the figure and ground scales and this can be a source of illusion.

The game used a ground scale of two metres per hex and between thirty seconds and five minutes of time per turn.

The mapboards are divided into hexagonal grids with each hex said to represent 40 metres of terrain, the result of the designer being asked what the ground scale was, rolling a die and it coming up 'four'.