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 Coordinators

Aundrea L. Tirapelle, Co-Chair dre.052806@gmail.com

Greg Sebourn, Co-Chair gregsebourn@johnson-frank.com

**CLSA 2014 Chapter of the Year**

Chapter News:

Our Newsletter "The Prism" March 2014

Won it's 2nd Newletter of the year Award at 2014 CLSA Conference

California Surveyor: "Spring 2014"


BPELSG BULLETIN: November 2013

Railroad - Fee or Easement?


H.R. 3370:
Homeowner Flood Insurance Affordability Act of 2013 signed by President 3/21/14.

New in the Library:

Merced County - County Surveyor opens File Share (adds Corner Records, Monument Ties, unrecorded surveys and more)
Stanislaus County - updated maps
San Joaquin County - added Widdows Field Books

O'Dell Engineering

is looking for a Survey Project Manager & an Assistant Surveyor for their Fresno office.
Also a party chief for their Modesto and Pleasanton offices.

CLSA 2013 Chapter Website of the Year