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Federal Office of Topography swisstopo

swipos-GIS/GEO

swipos-GIS/GEO is based on the Automated GNSS Network of Switzerland (AGNES). The data from the 30 AGNES stations are available for real-time applications using the technique of virtual reference stations (VRS).

Coverage

swipos-GIS/GEO is available all over Switzerland where GNSS and GSM* reception is possible.

* Indication of the ionosphèriques disturbances influencing RTK measurements are available by consulting the ionosphèrique index I95 on the web interface swipos.

Equipment

swipos-GIS/GEO requires a geodetic GNSS receiver which can be linked to a mobile phone (GSM/GPRS) and is equipped with the options for output of the approx. position (in NMEA format) and reception of correction data in the RTCM 3.1 format.

 

Benefit

  • Increased efficiency since a personal reference station is not required
  • Increased accuracy and reliability of RTK observations due to the VRS technique.
  • Furthermore the AGNES network is monitored on a high precision level.

Real-time services

Pay per use

New access without flat rate contract by GPRS/NTRIP charged CHF 0.50 per minute (communication costs exklusive).

 

Communication type:GPRS (General Packet Radio Service, Internet mobile)
Data format (input):NMEA: approximate position of the GPS receiver required for the computation of a virtual reference station
Data format (output):RTCM 3.1
Server:www.swipos.ch, Port: 2101
Protocol:NTRIP
Data streamPositionHeightRemark
VRS-LV95-LHN95LV95LHN95no transformation
VRS-LV03-LN02LV03*LN02**real-time FINELTRA and HTRANS
VRS-LV95-LN02LV95LN02**real-time HTRANS

*Approximate; mean FINELTRA transformation accuray 2 cm (data set CHENyx06); accuracy map available under FINELTRA data viewer.
**Approximate; accuracy a few cm

 

Flat rate

Access via internet (GPRS/NTRIP). Exclusive use, contract with swisstopo necessary.

 

Communication type:GPRS (General Packet Radio Service, Internet mobile)
Data format (input):NMEA: approximate position of the GPS receiver required for the computation of a virtual reference station
Data format (output):RTCM 3.1
Server:www.swipos.ch, Port: 2101
Protocol:NTRIP
Data streamPositionHeightRemark
VRS-LV95-LHN95LV95LHN95no transformation
VRS-LV03-LN02LV03*LN02**real-time FINELTRA and HTRANS
VRS-LV95-LN02LV95LN02**real-time HTRANS
Comments about this page: Geodesy
Last updated: 12.04.2012
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