tpoint_get_coord tpointseq_azimuth tpointseq_cumulative_length tpointseq_direction tpointseq_is_simple tpointseq_length tpointseq_linear_trajectory tpointseq_speed tpointseq_twcentroid tpointseqset_azimuth tpointseqset_cumulative_length tpointseqset_direction tpointseqset_is_simple tpointseqset_length tpointseqset_linear_trajectory tpointseqset_speed tpointseqset_twcentroid

tpointseq_linear_trajectory() GSERIALIZED * tpointseq_linear_trajectory ( const TSequence *  seq, bool  unary_union  ) Return the trajectory of a temporal point sequence. Parameters [in] seq Temporal sequence [in] unary_union True when the ST_UnaryUnion function is applied to the result to remove redundant geometry components. When computing the length of a trajectory we CANNOT apply the ST_UnaryUnion function. Note Since the sequence has been already validated there is no verification of the input in this function, in particular for geographies it is supposed that the composing points are geodetic @csqlfn Tpoint_trajectory()