Reference point

2015

(m)

2018

(m)

GPS

ΔE (m)

GPS

∆E (M)

DFM-004

1962.670

1962.799

0.129

0.048

DFM-001

2154.150

2153.029

−0.121

−0.036

H

1992.735

1992.408

−0.327

−0.008

S

2171.856

2171.854

−0.002

−0.008