Surveying fundamentals for coursework and FE exam prep — distance and angle measurement, leveling, traverses, and horizontal curves.
Each topic below has a video walkthrough. Watch in any order; they don’t depend on each other.
Surveying Topics
One video per concept
Distance Measurements
Measuring distances accurately is foundational in any surveying project. Traditional methods include pacing, chaining, and taping, but modern surveying relies on advanced tools like Electronic Distance Measurement (EDM) instruments and total stations. Understanding how to measure distance in surveying involves selecting the proper technique based on project size, terrain, and required precision. Surveyors must also account for errors like temperature, slope, and tape sag to maintain accuracy over long distances.
EDM Basics
Electronic Distance Measurement (EDM) instruments revolutionized surveying by providing faster, more accurate measurements over long distances. EDMs work by transmitting a beam of light or radio signal to a reflector and measuring the time it takes for the signal to return. This technology eliminates many of the manual errors associated with traditional chaining or taping and is particularly effective in rugged, inaccessible, or hazardous areas. Modern total stations incorporate EDM technology with angle measurement capabilities, making them a staple in contemporary surveying practices.
Distance Corrections
When measuring distances in the field, several factors can cause deviations from true horizontal distance, including slope, temperature, tension, and tape calibration. Surveyors must apply distance corrections to their raw measurements to obtain precise results. For example, slope corrections adjust measurements taken along an inclined surface to reflect horizontal distance, while temperature corrections compensate for tape expansion or contraction. Properly accounting for these variables ensures data accuracy and project reliability.
Differential Leveling
Differential leveling in surveying involves determining the difference in elevation between two or more points using a level instrument and a leveling rod. This technique is critical for establishing grades, designing drainage systems, and setting elevations for foundations and roadways. The process requires careful observation, precise instrument setup, and systematic recording of backsight and foresight readings. By transferring elevations across a site, surveyors can create detailed topographic maps and profiles essential for planning and design.
Horizontal Curves
Horizontal curves are essential elements in roadway, railway, and pipeline design, allowing paths to change direction smoothly and safely. Surveying for horizontal curves involves calculating parameters such as the radius, central angle, length of the curve, tangent distances, and chord lengths. Techniques like deflection angle and chord offset methods are used for setting out these curves in the field. Accurate curve layout ensures infrastructure follows planned alignments, minimizes environmental impact, and meets safety standards.
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What Is a Traverse?
A traverse is a series of connected lines whose lengths and directions are measured in the field. Traverses are classified as either open or closed. In an open traverse, the series of lines doesn’t return to the starting point, typically used for route surveys. A closed traverse, however, starts and ends at the same point or connects to a known location, allowing surveyors to check the accuracy of their work. Traverses are popular for establishing control networks, boundary surveys, and property division, offering a dependable way to map an area by breaking it into manageable segments.
Angles and Directions
Angles and directions form the backbone of land measurement and mapping. Horizontal angles help determine the relative position of different points, while vertical angles are used for measuring slopes and elevations. Theodolites, total stations, and digital levels are common tools for angle measurement. Bearings and azimuths are methods for expressing direction, with bearings typically confined within a 0° to 90° range relative to cardinal points and azimuths measured clockwise from the north. Mastery of these concepts ensures precise plotting of traverses, property lines, and construction layouts.
Quick Review with Shorts
Our YouTube Shorts cover surveying concepts in short, focused clips — useful between longer study sessions.
Written Examples
In addition to videos, we’ve included written surveying examples for every major topic. These clear, step-by-step problem solutions help you see how each problem is structured and solved using the correct formulas and techniques. Whether you’re working through an area computation or adjusting a traverse, these examples offer a reliable guide you can reference as you practice and study. Combined with our videos and quizzes, they deliver a complete, flexible learning experience.
Homework Help
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One-on-One Tutoring
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Discussion Boards
Surveying can get tricky, and that’s why our discussion boards are here for you. Whether you’re stuck on a bearing calculation or curious about how others handle leveling adjustments, jump into our community and ask away! It’s a great place to swap study tips, share problem-solving strategies, and help each other succeed. Don’t miss out — join the conversation and be part of a supportive, student-focused learning environment.
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