A New Map Projection for New Zealand?

Active GPS Control Networks in New Zealand

Civil GPS Service Interface CommitteeMelbourne, Victoria10-11 February 2003

Graeme BlickOffice of the Surveyor-GeneralLand Information New ZealandFebruary 2003

Networks and function

• 30+ stations

• national control network

• monitor NZGD2000

• provides 30 second RINEX files

• future development?

Land Information New Zealand National GPS Zero Order Network

Existing PositioNZ Stations (12) plus Cape Roberts Antarctica

Planned by July 2003 (7)

Planned by July 2005 (10) plus 1 in Antarctica

30 sec RINEX files available through the Internet

Networks and function

Networks and function

• coordinated by GNS

• includes Otago University (Dunedin) and MIT

Deformation Monitoring Networks

Networks and function

Existing PositioNZ Stations - study of regional deformation partnership with LINZ

Tide gauge monitoring - 4

Specific monitoring networks

Networks and function

• 3rd party funded (EQC)

• developed by GNS

• 60+ stations

Dense Regional Networks for Monitoring Crustal Deformation

Networks and function

Monitor deformation along the North Island subduction zone

Networks and function

• provide a varity of data formats (RINEX, RTCM)

• use data from some national stations

• commercial profit

• future partnerships

Privately Operated Networks

Networks and function

8 stations - some in partnership

Example of a Privately Developed Network

Conclusions

• A number of GPS active control networks

are being established

• Encouraging establishment of partnerships

between governement, science and

private sectors

• Provide positions in terms of

one unified system - NZGD2000