1. Contouring
The chapter provides a comprehensive understanding of contour mapping, including the definition and significance of contour lines, contour intervals, and their characteristics. It explores various methods for surveying and contour mapping, digital elevation models (DEMs), and the computation of areas and volumes. The relationship between contour intervals and factors such as map scale, terrain nature, and project purpose is emphasized, providing a practical framework for effective surveying and engineering design.
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Sections
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What we have learnt
- Contour lines represent elevations on maps and provide critical information about topography.
- The contour interval is determined by factors such as map scale, purpose, terrain type, and available resources.
- Different methods exist for contouring and determining areas and volumes, vital for engineering projects.
Key Concepts
- -- Contour Line
- An imaginary line on a map that connects points of equal elevation.
- -- Contour Interval
- The constant vertical distance between successive contour lines, which varies based on terrain and project requirements.
- -- Digital Elevation Model (DEM)
- A digital representation of terrain elevations used for various analyses and applications in surveying and engineering.
- -- Trapezoidal Rule
- A method used to estimate the area of irregular shapes by dividing them into trapezoids.
- -- Prismoidal Rule
- A formula used to compute volumes of prismoids, which are solids with non-parallel ends.
Additional Learning Materials
Supplementary resources to enhance your learning experience.