4.3 Spatial schema (ISO 19107)
155
Fig. 4.44. Operation asGM _ Geodesic
center
The operation center calculates the center of the circle of which this arc has a direct position. The Coordinate Reference System of the retumed DirectPosition will
be the same as that for the arc.
~center
Fig. 4.45. Operation center
radius
The operation radius calculates the radius of the circle of which this arc is a portion.
radius
Fig. 4.46. Operation radius
startOfArc
The operation startOfArc calculates the bearing of the line from the center of the
circle of which this arc is a portion to the start point of the arc. In the 2-dimensional
case this will be a start angle. In the 3-dimensional case, the normal bearing angle