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:

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

Our Newsletter "The Prism" November 2015

California Surveyor: "Fall 2015"


BPELSG Example CBT Examination Questions:

BPELSG Bulletin: Fall 2015


Renew Early

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

Land & Structure, Sonora

is looking for a California Licensed PLS or LSIT for a Full Time Field/Office Position

City of Sacramento

is looking for a Survey Party Chief
Closes: Fri. 12/11/15 5:00 PM

Solano County

is looking for a County Surveyor
12/18/15 Deadline to submit application for 1st application review.

Welty Engineering

is looking for a Party Chief

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