CZECH REPUBLIC AND

SYSTEM OF PERMANENT STATION GNSS CZEPOS

Eng. Karel BRAZDIL, PhD.

LAND SURVEY OFFICE OF THE CZECH REPUBLIC

karel.brazdil@cuzk.cz

C Z E C H O F F I C E F O R S U R V E Y I N G ,

M A P P I N G A N D C A D A S T R E

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C Z E C H R E P U B L I C I N E U R O P E

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GEODETIC REFERENCE SYSTEMS OF THE CZECH REPUBLIC

WGS 84 – WORLD GEODETIC SYSTEM – ELLIPSOID WGS 84 – UTM CARTOGRAPHIC PROJECTION - IS USED FOR MILITARY PURPOSES

3 BASIC GEODETIC SYSTEMS IN THE CZECH REPUBLIC ARE USED

ETRS 89 – EUROPEAN TERRESTIAL REFERENCE SYSTEM 89 ELLIPSOID GRS 80 – UTM CARTOGRAPHIC PROJECTION

USED FOR CIVILIAN PURPOSES – BASIC SYSTEM FOR GNSS - CZEPOS

JTSK – UNIFIED TRIGONOMETRIC SYSTEM FOR CADASTRE BESSEL‘S ELLIPSOID – SPECIAL CONIC PROJECTION USED FOR CIVILIAN PURPOSES

EARTH GEOID ELLIPSOID

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CARTOGRAPHIC PROJECTION USED IN THE CZECH REPUBLIC

UNIVERSAL TRANSVERSE MERCATOR (WGS 84)

WGS 84 - ELLIPSOID

KROVAK‘S PROJECTION SPECIAL FOR CZECH REPUBLIC

BESSEL ELLIPSOID

MILITARY TOPOGRAPHIC MAPS 1:25 000, 1:50 000, 1:100 000 AND 1:250 000

STANDARD NATO

CADASTRAL MAPS BASIC MAPS OF THE CZECH REPUBLIC 1:10 000, 1:25 000, 1:50 000, 1:100 000 AND 1:200 000

TRANSFORMATION

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BASIC GEODETIC TRIGONOMETRIC NETWORK

Since 1920 it was build: 73 300 basic trigonometric points (stones) 34 200 associated geodetic points (stones) 119 200 elevation (levelling) points 460 gravimetric points

Current density is about 1.3 points per km2 5

CZECH STATE LEVELLING NETWORK

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HTTP://BODOVAPOLE.CUZK.CZ

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ETRS REALIZATION IN THE CZECH REPUBLIC

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GEOPORTAL - TRANSFORMATION SERVICES

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GNSS NETWORK OF PERMANENT STATION - CZEPOS

27 GNSS PERMANENT STATION DISTANCE NO MORE THEN 50 km 10

GNSS NETWORK OF PERMANENT STATION - CZEPOS

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GNSS NETWORK OF PERMANENT STATION - CZEPOS

Receivers: Leica GRX 1200 Pro

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TECHNICAL INFRASTRUCTURE - CZEPOS

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CZEPOS – SERVICES AND PRODUCTS

Real-time services:

– additional information from the reference station for DGPS (differential GPS)

– additional information from the reference station for RTK (real time kinematics)

Post-processing products:

– downloading from CZEPOS web sites

– data files for further processing (RINEX format)

– archiving on data medium (DVD-RAM)

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MONITORING OF STABILITY

PERIODICAL MOVEMENT

SECULAR MOVEMENT

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MONITORING OF ACCURACY

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

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MONITORING OF AVAILABILITY (97%)

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RECAPITULATION – GEODETIC SERVICES IN CZE

• CZECH LAND SURVEY OFFICE MAINTAIN BASIC GEODETIC

INFORMATION AND OPERATE CZEPOS

• PRIVATE COMPANIES ENSURE GEODETIC WORK AND CADASTRAL

SURVEYING

• CZECH LAND SURVEY OFFICE SUPPORTS PRIVATE COMPANIES BY

BASIC GEODETIC INFORMATION AND BY CZEPOS SERVICES VIA

INTERNET

- 107 500 TRIGONOMETRIC POINTS (1,3 POINTS/ KM2) - 119 200 LEVELLING POINTS (1,4 POINTS/ KM2) - 460 GRAVIMETRIC POINTS

- CONTINUAL CZEPOS SERVICES FOR SURVEYING WITH GNSS

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C Z E C H O F F I C E F O R S U R V E Y I N G ,

M A P P I N G A N D C A D A S T R E

SURVEYING WITH CZEPOS IS CHEAPER

AND SIMPLY WONDERFUL

THANK YOU FOR YOUR

ATTENTION

KAREL BRAZDIL

LAND SURVEY OFFICE

OF THE CZECH REPUBLIC

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