360 Degree
450 Degree
540 Degree
630 Degree
200 Degree
720 Degree
400 Degree
(n - 1) 90
(n + 1) 90
(2n + 4) 90
(2n - 4) 90
90 Degree
180 Degree
270 Degree
Arial survey
Plane survey
Geodetic survey
Astronomical survey
