CRTN Data Policy

CRTN offers one free RTCM data stream per organization for single-base positioning with respect to the California Spatial Reference System (CSRS). Users must register with the CSRC to obtain access; to register, click here. Multiple data streams are available to Contributing and Consortium members. For more information, please click here and contact Maria Turingan (maria@ucsd.edu).
CRTN is divided into 4 subnetworks according to California Coordinate System (CCS83) zones, accessed through two IPs and 4 ports (2 ports per IP):Southern California, Zone 6: 132.239.154.80:2103
Southern California, Zone 5: 132.239.154.80:2104

Northern California, Zones 3-4: 132.239.152.175:2103

Northern California, Zones 1-2: 132.239.152.175:2104
CRTN Station List: for the breakdown of stations and relevant information, please click here to download the current Excel file.

Additional Updates

Contributing Members donate $1,000 annually, which provides access to a second NTRIP account for real-time access to RTCM 3.0 data (all users have free access to a single account). Additional access increases by $1,000 per account. Please note that contributing members do not participate in oversight/management of the network. All donations are used towards operating and maintaining CRTN and our data services. If you or your organization would like to donate, please go click here.
CRTN Consortium Members contribute $20,000 annually, which provides access to any 20 real-time CGPS sites 24/7. This membership has voting privileges on the CRTN Consortium, which oversees the development and management of the network.
Statewide CRTN Consortium Members contribute $150,000 annually, which provides access to all real- time CGPS sites 24/7. This membership has 3 voting privileges on the CRTN Consortium, which oversees the development and management of the network.

Participating Organizations: American Congress on Surveying and Mapping (ACSM) • American Council of Engineering Companies (ACEC) California • American Society of Photogrammetry and Remote Sensing (ASPRS) • BAsin and Range GEodetic Network (BARGEN) • Bay Area Regional Deformation (BARD) • Bureau of Land Management (BLM) • California Coastal Commission (CCC) • California Department of Water Resources (DWR) • California Land Surveyors Association (CLSA) • California State University Fresno • CalTrans • Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) • City of Los Angeles, Department of Public Works • City of Vacaville • County Engineers Association • East Bay Municipal Utility District (EBMUD) • ESRI • Geographical Information Systems Consultants • League of California Surveying Associations • Metropolitan Water District of Southern California (MWD) • National Oceanic and Atmospheric Administration (NOAA) • NOAA’s National Ocean Service (NOS) National Geodetic Survey (NGS) • Office of Management and Budget • Orange County Public Works • Riverside County Flood Control and Water Conservation District • RBF Consulting • San Diego Department of Public Works • San Francisco Bay Conservation and Development Commission (BCDC) • Santa Clara Valley Water District • Southern California Integrated GPS Network (SCIGN) • Stoddard and Associates • University of California, San Diego (UCSD) • U.S. Corps of Engineers • U.S. Geological Survey (USGS) • Urban and Regional Information Systems Association (URISA)