( Easting, Northing, Altitude )
(    3.00,     4.00,    10.00 ) a
(    0.00,     5.00,    10.00 ) b
(    0.00,     0.00,     0.00 ) d
(    1.83,     2.44,    10.00 ) u
(    0.00,     3.05,    10.00 ) v