A black cube of a room, marked with yellow grid lines.
Without any power, without any access to the grid line?
The electricity system and grid lines in the province are very stable.
The figure shows the grid lines do not intersect at 90 degree angle.
The grid lines were all straight now, the perspective perfectly linear everywhere.
For 1:50,000 maps, the grid lines are 2 cm apart.
For 1:25,000 maps, the grid lines are 4 cm apart.
Pieces always sit on the points of intersection of the board's grid lines.
He drew grid lines in the dirt, seeing how the points matched and there was the missing pattern.
Carefully hand printed on grid lines were the scientific names and locations of the plants.