The California Spatial Reference Center (CSRC) is responsible for “Establishing and maintaining an accurate state-of-the-art network of GPS control
stations for a reliable spatial reference system in California.” The CSRC was established 1997 as a partnership with surveyors, engineers, GIS
professionals, the National Geodetic Survey (NGS), the California Department of Transportation (Caltrans), and the geodetic and geophysical communities.
The CSRC also maintains the California Real Time Network (CRTN), established in 2003 to (1) provide base station support for precise positioning
(e.g., RTK surveys) and spatial referencing, (2) support research into earthquake early warning and response systems. CRTN rebroadcasts real-time
data streams from multiple servers to registered users.
The CSRC is operated by the Scripps Orbit and Permanent Array Center (SOPAC) located at the Cecil H. and Ida M. Green Institute of Geophysics and
Planetary Physics (IGPP) at Scripps Institution of Oceanography.
CRTN Community Notice
• CRTN has completed the transition to CSRS Epoch 2017.50 (NAD83), effective March 1, 2018
• The CRTN Southern California server has a new IP (updated February 6, 2018): 22.214.171.124
• The CRTN northern California server has a new IP (updated August 5, 2017): 126.96.36.199
California Spatial Reference Center (CSRC) Coordinating Council Semi-Annual Meeting Main Topics of Discussion: CSRS Epoch 2017.50 (NAD83), California Real Time Network updates, CSRC, and topics and issues of relevant to California
Date: May 10, 2018, Thursday
Time: 10:00 AM to approximately 3:30 PM
9:30-10:00 AM meet and greet, orientation, and light breakfast
Lunch will be provided around noon
Location: IGPP Dept., Scripps Institution of Oceanography (SIO), UCSD
Martin Johnson House (Building T29)
8840 Biological Grade, La Jolla, 92037
There are no registration fees or costs. However, you must RSVP by email to email@example.com by May 1st to reserve a seat and lunch and to receive additional information
regarding required parking permits and directions to the Martin Johnson House.
In February 2018, the CSRC published a new geodetic datum for California called “CSRS Epoch 2017.50
under a Caltrans contract to SIO/SOPAC.
CRTN is now transmitting CSRS Epoch 2017.50 (NAD83) coordinates, effective March 1, 2018