Imperial Units
GSL_CONST_MKS_INCH
The length of 1 inch.
GSL_CONST_MKS_FOOT
The length of 1 foot.
GSL_CONST_MKS_YARD
The length of 1 yard.
GSL_CONST_MKS_MILE
The length of 1 mile.
GSL_CONST_MKS_MIL
The length of 1 mil (1/1000th of an inch).