USGS/Cascades Volcano Observatory, Vancouver, Washington

REPORT:
Using First-Order Class II Geodetic Leveling Procedures to Monitor Vertical Displacement

-- Kenneth M. Yamashita and William P. Kaiser, Using First-Order Class II Geodetic Leveling Procedures to Monitor Vertical Displacement, IN: Ewert and Swanson, (eds.), 1992, Monitoring Volcanoes: Techniques and Strategies Used by the Staff of the Cascades Volcano Observatory, 1980-1990: USGS Bulletin 1966, p.135-141.

Abstract
Background
Federal Guidelines for Geodetic Leveling
First-Order Class II Levels
- Equipment
  - Level Instrument
  - CVO Instrumentation
  - Level Rods
  - Temperature Probes
- Bench-mark Spacing and Installation
- Procedures to Follow During Data Collection
  - Adjustment of Level Instrument
  - Parallax Adjustment
  - Peg Test
  - Adjustment of Level Vials
  - Field Procedures
  - Sources of Error
- Data Reduction
  - Computation of Collimation Error
  - Refraction Correction
  - Orthometric Correction
  - Rod Temperature Correction
  - Level Collimation Correction
  - Equation to Calculate Standard Error for Double-Run Segments
  - Equation to Calculate Closure Error
  - Magnetic Error
Acknowledgments
References Cited

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02/19/98, Lyn Topinka

REPORT: Using First-Order Class II Geodetic Leveling Procedures to Monitor Vertical Displacement

Table of Contents

REPORT:
Using First-Order Class II Geodetic Leveling Procedures to Monitor Vertical Displacement