Plastic marker posts are installed at 100 m (approximately 5 chain) intervals.

Volunteers will be excavating shovel probes at 20 m intervals.

Similar strips of wood are then fixed vertically at 1.8 m (6 ft) intervals.

The targets are spaced at 140 m intervals.

Support masts are spaced at 54 m (175 ft) intervals.

Among them are emergency telephones and cameras at 100 m intervals.

Cable joint bays are installed at 500-800 m intervals.

Most new vineyards are planted with rows at 3 m intervals to allow mechanisation.

More than 400 pits, 1 m across and at 2.5 m intervals, stood in rings at the site.

The same structure, based on 400 m intervals, coincides with current practices for transit route location.