Input : Settlement instrument  of Ring infomation, Distance of Profile Line, and selected date

Output : Correlation beetween rate of settlement, distance of profile line and reading date  from settlement instrument and selected date range

x = time (day)

y = rate of settlement (mm/day)

Rate of settlement =(Rn – Rn-1)/(Dn – Dn-1)

where:

Rn = reading value in reading n

Rn-1 = reading value in reading n-1

Dn = date of reading in reading n

Dn-1 = date of reading in reading n-1