The Land Survey Office performs
 administration of basic geodetic control of the Czech Republic
 decides on the localization, transfer or removal of geodetic marks
Geodetic control:
Classical ⇒ horizontal, vertical, gravity
(classical terrestrial networks, methods and points)
Modern ⇒ GNSS permanent stations network
Horizontal control
Czech State Trigonometric Network
original state
ETRS realization in the Czech Republic
Czech state levelling network
Práce v ČSNS
Geodynamic
benchmarks
http://bodovapole.cuzk.cz
72 000 trigonometric and densification points
83 000 levelling points
400 gravity points
web interface
GNSS Network of Permanent Stations of the Czech Republic
Antennas: Leica AT 504
Receivers: Leica GRX 1200 Pro
• Real-time services:
– additional information from
the reference station for
DGPS (differential GPS)
– additional information from
the reference station for RTK
(real time kinematics)
Services and Products
• Post-processing products:
– downloading from CZEPOS
web sites
– data files for further
processing (RINEX format)
– archiving on data medium
(DVD-RAM)
Monitoring of stability
Stanice
lineární pohyb amplituda
[mm/rok] [mm]
N E N E
CJIH 2,7 2,0
CDAC 1,3
CPRI 2,4
CKAP 1,7
CTRU 1,9
CSUM 1,5
CVSE 2,1
CMOK 1,1
CHOD 1,4 1,7 2,2
CPRA -1,2 -3,0 1,3
CLIT 2,6 -3,4
CPRG 2,0 -3,3
• 10 stations - periodical
movement
• 3 stations – secular
movement
Monitoring of quality
SpiderWeb
Monitoring of accuracy
- Internet application, created in cooperation with
CTU
- 75 testing areas on the territorry of CR including
border areas
- there are 3 testing baselines in each area
- each baseline is tested from RTKxVRS service
CZEPOS - international cooperation
http://www.cuzk.cz/zu
Thank you for your attention