CA PLS Exam Preparation

Comprehensive preparation for the California Professional Land Surveyor (PLS) exam. Based on the January 2025 Test Plan with 6 modules and 57 topics. Content adapted from CalTrans LS/LSIT Video Exam Preparation Course materials.

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Lesson 1

Topographic and As-Built Surveys

Topographic and As-Built Surveys

Overview

Topographic surveys capture existing ground conditions, while as-built surveys document constructed improvements. Both require systematic data collection and attention to detail.

Learning Objectives

  • Plan and execute topographic surveys
  • Perform as-built surveys for construction
  • Document survey findings appropriately
  • Deliver products meeting client needs

Key Concepts

Topographic Survey Methods

Data collection approaches:

  • Total station and data collector
  • GNSS positioning
  • Photogrammetry and LiDAR
  • Conventional leveling
  • Combination methods

Feature Collection

Categories of features to collect:

  • Ground shots for terrain modeling
  • Breaklines and grade changes
  • Structures and improvements
  • Vegetation and land cover
  • Utilities and infrastructure

As-Built Documentation

As-built survey requirements:

  • Actual constructed locations
  • Deviations from plans
  • Final grades and elevations
  • Utility depths and locations
  • Monument positions

Data Processing

Processing collected data:

  • Download and verification
  • Coding and attribution
  • Surface modeling
  • Map/plan preparation
  • Quality control checks

Key Terms

  • DTM: Digital Terrain Model - ground surface representation
  • Breakline: Linear feature controlling surface modeling
  • TIN: Triangulated Irregular Network

Practice Questions

  1. What factors determine the appropriate data collection method for a topographic survey?
  2. What information should be documented in an as-built survey?

Based on CalTrans LS/LSIT Video Exam Preparation Course materials.