ColumnTypes.hpp
74 EchoNumber = 61, ///< This is the k-th return/echo for a certain pulse, where for the first return: k==1 (see LAS spec.)
75 NrOfEchos = 62, ///< The pulse which this point is based on generated this number of returns/echoes (see LAS spec.)
100 ScanAngle = 95, ///< [radians] also: pan angle. Rotation of scanner head around primary axis of scanner (the only axis of 1-D scanners, for 2-D scanners: the pan angle)
