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

tpointseqset_linear_trajectory() GSERIALIZED * tpointseqset_linear_trajectory ( const TSequenceSet *  ss, bool  unary_union  ) Return the trajectory of a temporal point sequence set. Parameters [in] ss Temporal sequence set [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. @csqlfn Tpoint_trajectory()