See this blog Why You Should Care About Segmental Duplications for some nice explanation.
vtools show annotation genomicSuperDups -v2
Annotation database genomicSuperDups (version hg19_20130626)
Description: Duplications of >1000 Bases of Non-RepeatMasked
Sequence (>90 percent similar).
Database type: range
Number of records: 51,599
Distinct ranges: 40,832
Reference genome hg19: chr, start, end
Field: chr
Type: string
Comment: Reference sequence chromosome or scaffold
Missing entries: 0
Unique Entries: 80
Field: start
Type: integer
Comment: Start position in chromosome
Missing entries: 0
Unique Entries: 30,451
Range: 1 - 249235635
Field: end
Type: integer
Comment: End position in chromosome
Missing entries: 0
Unique Entries: 30,690
Range: 1832 - 249240008
Field: name
Type: string
Comment: Other chromosome involved
Missing entries: 0
Unique Entries: 30,525
Field: otherChr
Type: string
Comment: Other chromosome or scaffold
Missing entries: 0
Unique Entries: 80
Field: otherStart
Type: integer
Comment: Start position of other region
Missing entries: 0
Unique Entries: 30,451
Range: 0 - 249235634
Field: otherEnd
Type: integer
Comment: End position in chromosome
Missing entries: 0
Unique Entries: 30,690
Range: 1832 - 249240008
Field: otherSize
Type: integer
Comment: Total size of other chromosome
Missing entries: 0
Unique Entries: 80
Range: 19913 - 249250621
Field: alignL
Type: integer
Comment: spaces/positions in alignment
Missing entries: 0
Unique Entries: 13,141
Range: 1001 - 777920
Field: indelN
Type: integer
Comment: number of indels
Missing entries: 0
Unique Entries: 436
Range: 0 - 993
Field: indelS
Type: integer
Comment: indel spaces
Missing entries: 0
Unique Entries: 4,617
Range: 0 - 92315
Field: matchB
Type: integer
Comment: aligned bases that match
Missing entries: 0
Unique Entries: 12,497
Range: 1000 - 766171
Field: mismatchB
Type: integer
Comment: aligned bases that do not match
Missing entries: 0
Unique Entries: 12,623
Range: 900 - 766171
Field: transitionsB
Type: integer
Comment: number of transitions
Missing entries: 0
Unique Entries: 2,659
Range: 0 - 9703
Field: transversionsB
Type: integer
Comment: number of transversions
Missing entries: 0
Unique Entries: 1,880
Range: 0 - 5953
Field: fracMatch
Type: float
Comment: fraction of matching bases
Missing entries: 0
Unique Entries: 1,442
Range: 0 - 4002
Field: fracMatchIndel
Type: float
Comment: fraction of matching bases with indels
Missing entries: 0
Unique Entries: 21,193
Range: 0.9 - 1
Field: jcK
Type: float
Comment: K-value calculated with Jukes-Cantor
Missing entries: 0
Unique Entries: 21,393
Range: 0.88604 - 1
Field: k2K
Type: float
Comment: Kimura K
Missing entries: 0
Unique Entries: 23,215
Range: 0 - 0.107326