GM_TriangulatedSegment Table

The GM_TriangulatedSegment table stores triangulated segment clusters from the GEDmatch AutoSegment tool. When several matches share overlapping segments on the same chromosome, they form a triangulated group — strong evidence of a common ancestor. Each row is one match’s segment within such a cluster, tagged with the cluster it belongs to.

kita and kitb

kita is your (primary) kit — the base kit the AutoSegment run was performed for — and kitb is the match kit whose segment is part of the cluster. The match kit number is extracted from the match URL in the AutoSegment data.

How It Is Populated

Rows are written from the AutoSegment processor when it parses the triangulated-segment cluster data on the AutoSegment results page. Matches that share overlapping segments on the same chromosome are assigned the same cluster number.

Column Reference

Column	Type	Description
Id	int (PK)	Auto-incrementing primary key
kita	string	Your (primary) kit number — the base kit of the AutoSegment run. References GM_Kit.kit_num.
kitb	string	The match kit number whose segment is in this cluster, extracted from the match URL. References GM_Kit.kit_num.
match_name	string	Display name of the match.
email	string	Contact email of the match.
cluster	int	The triangulated cluster number. Matches in the same cluster share overlapping segments — the triangulated group.
chromosome	int	Chromosome number the segment is on.
p1	int	Segment start position (base-pair position on the chromosome).
p2	int	Segment end position (base-pair position on the chromosome).
cm	decimal	Length of this segment, in centimorgans.
snps	int	Number of SNPs in the segment.
total_cM	decimal	Total shared DNA between your kit and this match, in centimorgans.

Related Tables

• GM_Segment — the underlying per-pair shared segments.
• GM_ICW — in-common-with relationships behind a cluster.
• GM_Kit — resolves kita / kitb to people.