( Easting, Northing, Altitude )
(    0.00,     0.00,     0.00 ) 1
(    4.00,     0.00,     0.00 ) 2
(    2.00,    -0.00,     0.00 ) a
(    2.00,     3.00,     0.00 ) b
(    2.00,     5.00,     0.00 ) c