Central Valley Chapter
California Land Surveyors Association

Promoting the professional practice of land surveying in the California Central Valley.
Serving the greater Merced, Stanislaus and San Joaquin County Area."


What is Trigstar?


Trig Star is an annual high school mathematics competition based on the practical application of Trigonometry. Students that participate are not only provided with an opportunity to earn awards, but also leave with a better understanding of the technical profession of Land Surveying and Mapping.


Professional Land Surveyors use the Trig Star program to advance communication with the communities they serve.

The purpose of the program is:

  • To promote the study of trigonometry in high school and to promote excellence in the mastery of trigonometry by honoring the individual student who has demonstrated superior skill among classmates at the High School level.
  • To acquaint the high school geometry and trigonometry students with the use and practical application of geometry and trigonometry in the surveying profession.
  • To build an awareness of surveying as a profession among the mathematically-skilled high school students, career guidance counselors and high school math teachers.

What happens during the Trig-Star Contest?

A presentation by a Land Surveyor to help participants understand the Land Surveying/ Geomatics Profession. The exam is a timed exercise, during which students must solve trigonometric problems that incorporate the use of the right triangle formulas, the law of sines, and the law of cosines. The student with the highest score and fastest time will be named the "Trig Star" for each high school participating in the program. The scores and times of the Trig Stars are reviewed to determine the State Winner and Runner-up in California. The State Winner will qualify to take the National Exam.

The Trig Star program is sponsored nationally by the National Society of Professional Surveyors.

Local Trigstar Coordinator

Bill Koch koch1313@yahoo.com

State Trigstar Coordinator

Annette Lockhart, Chair LadyLandSurveyor@gmail.com

Chapter News:

Fall LS Review -
Focus on Mapping and Document Prep

Saturdays from 9/26/2015 until 10/24/2015
from 8:00 AM to 12:00 PM (UTC-08:00) Pacific Time.
$20 per session or $50 for all sessions
  • Caltrans Farmers Market Plaza III
  • 1727 30th Street
  • Sacramento, CA, 95816
  • (1st Floor Conf. Rm.)
For more information, contact:
RobPLSCA@gmail.com (Cellular: 760-846-4491)

Registration Form

Steve Parrish, PLS, WRS, CFedS
Walking in the Footsteps
& Double Monumentation

  • Wednesday December 2, 2015
  • from 8:00 AM to 4:30 PM
  • $75 per session for CLSA Members
    (or $125 for both when purchased together)
  • $100 per session for for non-members
    (or $175 for both when purchased together)
  • 1010 Tenth Street
  • Basement Training Room (B300)
  • Modesto
Register Here

San Joaquin Delta College

"This is where we are asking for help. One of the activities for grades 9-12 is a small surveying demonstration. We have several total stations at SJDC that we can use, but we are looking for additional equipment and people to help with the project. If anyone is interested in helping on October 2, please let me know. If you are interested in helping develop the project for the students, please let me know that as well."

Danell Hepworth


Next Clean-up: October 3, 2015

Our Newsletter "The Prism" September 2015

California Surveyor: "Summer 2015"


BPELSG Example CBT Examination Questions:

BPELSG Bulletin: Summer 2015


Notice of Department Designation Forms

Proposed Changes to Corner Reords

Land Surveyor Exam Development Workshops
(copied from the Sacramento Chapter newsletter)

Tuolumne County

is looking for a Land Surveyor I/II
Closes: October 14, 2015

New in the Library:

Sacramento County - added link to Geographical Map Index
(includes Maps and Parcel Maps, ROS estimated for September, then Corner Records & .....)
Added Historical FEMA Maps Stanislaus, Merced and San Joaquin Counties
Fresno County - updated record maps
Stanislaus County - updated record maps
San Joaquin County - updated ROS, PM, M&P, Corner Records

CLSA Chapter Website of the Year - 2012-2014