CIGAL Reference Manual, Chapter 3 (Functions): area
usage: result = area(vlist,[scalefactor])
AREA calculates the area within a region defined by a list of graphics vectors, VLIST. If VLIST does not define a closed region, the returned value is 0. Specifying SCALEFACTOR converts both output values from pixel units to other units.
See Also:
CALFACT(4),
LENGTH(3),
MEASURE(3),
SKETCH(2),
VECTORS(1)