
Grid to Ground & Site Calibration
Date: September 23, 2025
Time: 8:00 am to 5:00 pm (MST)
Instructors: Jack Bond, Mike Casman, & Chuck Hutchins
Location: New Mexico Vectors Office

Our old nemesis! Even today, Grid to Ground continues to be the most perplexing and misunderstood element of contemporary measurement. Among all support queries, the Vectors team tackles Grid to Ground questions more than any other issue... Period!
This class is designed to provide education, clarity, and and step-by-step methods for computing or validating Grid to Ground relationships.
Are you new to Trimble Site Calibration procedures or do you need a refresher?
This class will cover the essential aspects of Site Calibrations that will ensure you have confidence in the outcomes. The Vectors team will guide you through both a field exercise with Trimble Access and an office portion with Trimble Business Center.
Topics Include:
-
Grid to Ground
- Theory
- Projections
- Scale Factors
- Inverse Relationships
- Keying-In Control Diagrams (DOT)
- Creating Your Own Control Diagrams
- Low Distortion Projections
- Data Analysis (QC)
- Geoid Models and Orthometric Heights (Elevation)
-
Site Calibration
- Properly Setting-up a Job
- Keying in a Predefined Site Calibration (Local Site)
- Scale Factors
- Grid to Ground
- Projection
- Datum Transformation
- Horizontal Adjustment
- Vertical Adjustment
- Data Analysis (QC)
Grid to Ground & Site Calibration
Grid to Ground & Site Calibration
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