the area to convert
the output unit
Optional
fromUnit: JMAP_DISTANCE_UNITSthe input unit
if invalid parameters
// returns 2 square kilometers in square miles
JMap.Geometry.convertArea(2, "miles")
// returns 200 square meters in square yards
JMap.Geometry.convertArea(200, "yards", "meters")
JMap.Geometry.convertArea
Converts the area from a unit to another.