Modesto Calibration Baseline Rehabilitation Project
Land Surveyors can use a set of surveyed monuments located along a baseline to check the electronic distance meters on their measuring equipment. (Electronic distance meters are typically included on total station instruments, which measure both angles and distances). These monuments are certified by the National Geodetic Survey (NGS) and are known as “calibration baselines”.
There is an existing calibration baseline in Modesto, California. The Central Valley Chapter of the California Land Surveyors Association has completed the rehabilitation this calibration baseline, which fell into disuse.
The initial site inspection was completed in the Spring of 2010. The measurement of the baseline by volunteers from the CLSA California Central Valley Chapter with the assistance of NGS was completed in the Summer of 2010.
- Baseline Measurement Complete: The official publication of the baseline monument distances is complete. You will find the published data for our Modesto baseline in the NGS datasheet listing data for all California baselines. The data for just the Modesto baseline is also listed in the PDF linked to in the NGS Results section below.
- Baseline Measurement Complete: The measurement of the baseline monuments was completed by CLSA Central Valley Chapter volunteers and NGS. The baseline measurement took two (2) long days of field work. Staff from the City of Manteca, City of Modesto, Stanislaus County, Northstar Engineer, and KSN spent portions or all of the two (2) days assisting at the baselines. (The chapter sent letters of appreciation and thanks to each organization that contributed trucks, equipment, and man hours to the baseline measurement.) You can view photos of the baseline measurement below.
- Site Inspection Complete: Keith Spencer and Landon Blake performed a site inspection at the CBL site in Modesto. They recovered and took photographs of all four (4) CBL monuments. The photographs, written description of the monument locations, and monument coordinates provided by the Stanislaus County Surveyor Department were all delivered to Marti Ikehara, the NGS Advisor for California.
- CBL Measurement Date Scheduled: Monday, August 23 and Tuesday, August 24 are the dates tentatively schedule for measurement of the CBL monuments with the equipment from NGS. This means leveling work at the baseline will need to be performed at the end of June or beginning of August.
Site Inspection Data
You can download the Calibration Results for the Modesto Baseline.
Site Inspection Photos
|Monument #1||Monument #1||Monument #2|
|Monument #2||Monument #3||Monument #3|
|Monument #4||Monument #4|
Baseline Measurement Photos
Wayne G. Sutton, LS 3863It is with the utmost sadness that I have to pass on that Wayne G. Sutton, LS 3863, my friend and mentor, after a long and brave struggle, passed on Monday morning (August 25th) at Central Valley Specialty Hospital in Modesto. He was surrounded by his family. He leaves a huge void in our surveying community. His knowledge and leadership will missed by all.
More information from Fran
Wayne's Modesto Bee Obituary
CLSA By-Laws Revisionshave been mailed. Please review, vote and return prior to September 10.
Our Newsletter "The Prism" July 2014
New California Surveyor: "Spring 2014"
BPELSG Bulletin: Summer 2014
BPELSG Strategic Plan: Adopted: July 31, 2014
New California Appellate Court caseStresses the importance of "following the footsteps of the original surveyor"
Michael Baker InternationalIs looking for a Manager of Surveying Geomatics
in Sacramento or Walnut Creek, CA
New in the Library:Merced County - updated record maps
added Swamp & Overflow Directory
Mariposa County - updated maps
San Joaquin County - updated ROS, PM, M&P, Corner Records
Upcoming WorkshopsEvolution of NAD 83 & Coping w/ Changing Positional Coordinates
Evolution of NAD 83 in the United States & Coping w/ Changing Positional Coordinates Due to Crustal Motion
Speaker: Dr. Richard Snay
Register online - Oakland (September 17th)
CLSA-CSRC Workshop - Get a Grip – Keeping Control of Your Work
October 3rd - Ontario ~ October 10th - Oakland
Registration not yet available.
Upcoming WebinarsFree for CLSA Members
Tidal Datums, and Mapping Sea Level Rise
Speaker: Curt Burfield, PLS
August 28th 12:00-1:30pm
Understanding the Test Plan for the LS Exam. How to Know if the Person You’re Signing a Reference for is Ready to be Licensed
Speaker: Ray Mathe, PLS
September 10th 12:00-1:30pm
CSU Fresno Survey Program
Speaker: Dr. Munjy
October 2nd 12:00-1:30pm
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CLSA Chapter Website of the Year