Introduction to Field Evidence in Land Surveying

Learning Objectives

Challenge of the Day

Lost Corner Scenario

You've been tasked with reestablishing a section corner where the original monument is missing. You have:

  • Original GLO field notes from 1876
  • A nearby witness tree matching the notes
  • Several fence intersections in the vicinity
  • Modern GPS coordinates from a previous survey

How would you evaluate and prioritize this evidence to make your determination?

Types of Field Evidence

  • Original Monuments

    Physical markers placed during original survey

  • Natural Features

    Trees, waterways, ridgelines, etc.

  • Artificial Features

    Fences, walls, buildings, roads

  • Testimonial Evidence

    Witness statements, historical accounts

Hierarchy of Evidence

Original Monuments Natural Monuments Artificial Monuments Testimonial Evidence Measurements

Interactive Exercise

Evidence Classification Practice

Drag each item to its correct evidence category:

Key Concepts

Reliability

Understanding factors that affect evidence reliability and authenticity

Documentation

Methods and best practices for recording field evidence

Preservation

Techniques for protecting and maintaining evidence integrity

Next Steps