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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."

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What is Trigstar?

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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.

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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

Chapter News:

Congratulations to new local LS

David Mulenga, LS 9168
Chris Martin, LS 9179


Proposed Revisions CC&Rs 416 and 3060

Proposed modifications to the Substantial Relationship Criteria regulations

Comments due by Jan. 5th 2015.


Adopt-A-Road

Saturday November 15, 2014

Senate Bill 1457


8725.1 will be added to the LS Act.

8771 will be amended in the LS Act.


Senate Bill 1050

requires new addition to notary acknowledgment


2009 Manual of Instructions

is now available as a searchable pdf.


Our Newsletter "The Prism" November 2014

New California Surveyor: "Winter 2014"

BPELSG News:

BPELSG Example CBT Examination Questions:

BPELSG Bulletin: Fall 2014

BPELSG Strategic Plan: Adopted: July 31, 2014


Turlock Irrigation District is looking

for a Surveying Technician


City/County of San Francisco is looking

for Surveying Assistants

Closes Jan. 6, 2015


New in the Library:

Stanislaus County - Started adding Unfiled Surveys from DF Engineering archives
City of Modesto - Added Block Books (County Surveyors copy)
San Joaquin County - updated ROS, PM, M&P, Corner Records
Tuolumne County - Updates to Corner Records/ROS/Parcel Maps
  added UR files
Sacramento County - updated record maps/corner records
  added Unrecorded Maps
Tulare County - Added County Surveyor link/record maps


CLSA Chapter Website of the Year