Database: hg19    Primary Table: ctgPos    Row Count: 249
Format description: Where a contig is inside of a chromosome.

field	example	SQL type	info	description
contig	GL000001.1	varchar(255)	values	Name of contig
size	257719	int(10) unsigned	range	Size of contig
chrom	chr1	varchar(255)	values	Reference sequence chromosome or scaffold
chromStart	10000	int(10) unsigned	range	Start in chromosome
chromEnd	267719	int(10) unsigned	range	End in chromosome

contig	size	chrom	chromStart	chromEnd
GL000001.1	257719	chr1	10000	267719
GL000002.1	153649	chr1	317719	471368
GL000003.1	3323900	chr1	521368	3845268
GL000004.1	9224644	chr1	3995268	13219912
GL000005.1	16558170	chr1	13319912	29878082
GL000006.1	90908613	chr1	30028082	120936695
GL000007.1	398739	chr1	121086695	121485434
GL000008.1	432327	chr1	142535434	142967761
GL000009.1	426764	chr1	143117761	143544525
GL000010.1	126477	chr1	143644525	143771002

Note: all start coordinates in our database are 0-based, not 1-based. See explanation here.

Description

This track shows the locations of human contigs on the physical map. The underlying data is derived from the GRCh37 AGP file that accompanies this assembly. All contigs in this track are oriented to the "+" strand.

Method

For human genome reference sequences dated April 2003 and later, the individual chromosome sequencing centers are responsible for preparing the assembly of their chromosomes in AGP format. (see also: AGP File Specification) The files provided by these centers are checked and validated at NCBI, and form the basis for the AGP file that defines the physical map contigs.

For more information on the human genome assembly process, see NCBI Assembly Primer.