Land Survey  ·  Level 5
Cadastral Survey
Chapter 2: Establish cadastral survey control points
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⚑ What you will be able to do

By the end of this chapter, you will be able to: - select the right tools, equipment, and materials to safely and correctly establish cadastral control points - accurately identify different types of existing control points in the field - choose the correct methods for establishing cadastral survey control points according to work requirements - properly monument cadastral survey control points by following the survey manual

Mastering these skills will help you play a key role in ensuring land boundaries are marked and recorded accurately in the surveying industry.

Establishing cadastral survey control points is a fundamental step in land surveying in Kenya, providing the backbone for accurate parcel boundary determination and land registration. These control points serve as fixed reference markers that ensure consistency and reliability in cadastral surveys across diverse terrains and urban settings. Mastery of the tools, equipment, and methods used to establish these points is crucial for surveyors to deliver precise and legally defensible survey results. This chapter focuses on the practical aspects of setting up cadastral survey control points using traversing and Global Navigation Satellite System (GNSS) technologies, alongside the identification of control points using oral marks.

2.1 Tools, equipment and materials for establishment of cadastral control points survey control

The choice of tools and equipment in cadastral control point establishment directly affects survey accuracy and efficiency. In Kenya, surveyors commonly use traversing and GNSS technologies, each with specific instruments and materials tailored to field conditions and project requirements. Understanding the specifications, proper usage, and maintenance of these tools helps safeguard the integrity of the cadastral control network throughout the survey lifecycle.

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🔒2.2 Identify control points

In cadastral surveying, control points must be clearly and durably marked on the ground to facilitate future identification and reoccupation. Oral points are physical markers, often pegs, stones, or metal pins, installed at control stations and referenced in s…

🔒2.3 Methods of establishing cadastral survey control points

Traversing is a traditional and widely applied method in cadastral surveying for establishing control points by measuring distances and angles between stations on the ground. It remains essential in areas with limited GNSS signal availability, such as dense fo…

🔒2.3.3 Triangulation

Triangulation is a fundamental method in establishing cadastral survey control points in Kenya. This technique is essential for creating a network of accurately positioned points over large areas, which is critical for property boundary demarcation and land re…

🔒2.3.4 Levelling

Levelling is a critical method for establishing vertical control points in cadastral surveys across Kenya. Accurate height information ensures correct boundary demarcation, especially in hilly or uneven terrain prevalent in counties like Kericho and Nandi. Sur…

🔒2.3.5 Trilateration

Trilateration is a surveying method used to establish cadastral control points by measuring distances rather than angles. In Kenya’s cadastral practices, trilateration is often applied in urban and rural settings where line-of-sight for angular measurements is…

🔒2.4 Cadastral survey control points monumentation

In cadastral surveying within Kenya, the monumentation of control points is a critical process that ensures the accuracy and permanence of boundary definitions. These control points serve as physical references for property boundaries, enabling future surveys…

Chapter Summary

This chapter covered the essential tools, equipment, and materials required for establishing cadastral survey control points, emphasizing their suitability for accurate and reliable measurements. It introduced the concept of control points and the importance of identifying them clearly using oral points for effective communication and reference. Various methods for establishing cadastral survey control points were discussed, including traversing, GNSS, triangulation, levelling, and trilateration, each with its specific applications and procedural steps. The chapter highlighted the significance of selecting appropriate methods based on terrain, accuracy requirements, and available resources. Finally, it examined the process of monumentation, detailing how control points are physically marked and protected to ensure their longevity and usability in cadastral surveys. This comprehensive overview provides a solid foundation for conducting precise and dependable cadastral control surveys.

Self-Assessment

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A. Written Assessment

  1. Which of the following tools is essential for establishing cadastral survey control points?
    a) Theodolite
    b) Dumpy level
    c) Total station
    d) All of the above
    (2 marks)

  2. Define the term survey control point in the context of cadastral surveys. (3 marks)

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Chapter Examination Questions

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SECTION A (40 Marks) - Answer ALL Questions

  1. List four essential tools and equipment required for establishing cadastral survey control points in a typical rural land parcel survey in Kenya. (4 marks)
  2. Explain the purpose of using oral points in identifying cadastral control points during a survey. (4 marks)
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Am I competent?

At the start of this chapter we promised you would be able to:

  • select the right tools, equipment, and materials to safely and correctly establish cadastral control points
  • accurately identify different types of existing control points in the field
  • choose the correct methods for establishing cadastral survey control points according to work requirements
  • properly monument cadastral survey control points by following the survey manual

Tick each one you can genuinely do.

So, are you there yet?

You're competent when you can confidently do 50% or more of what this chapter promised.

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