rate - a magnitude or frequency relative to a time unit; "they traveled at a rate of 55 miles per hour"; "the rate of change was faster than expected"

placement, arrangement - the spatial property of the way in which something is placed; "the arrangement of the furniture"; "the placement of the chairs"

openness - without obstructions to passage or view; "the openness of the prairies"

distance - the property created by the space between two objects or points

dispersion, distribution - the spatial property of being scattered about over an area or volume

compactness, concentration, denseness, density - the spatial property of being crowded together