Mainline Surveys

Drone Topographical Survey

Topographical surveys delivered using drone imagery and photogrammetry.

Overview

Drone topographical surveys combine aerial imagery with ground control to produce accurate terrain models and topographical plans. They are particularly efficient on large or open sites where traditional methods would be slower.

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Our Process

  1. 1Define required accuracy and coverage for the survey
  2. 2Install ground control points and check survey control
  3. 3Fly the site with sufficient overlap and altitude for processing
  4. 4Process imagery into point clouds and surface models
  5. 5Derive contours and topographical detail where required
  6. 6Deliver drawings, models and orthophotos to the design team

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Benefits

  • Rapid coverage of large areas
  • Reduces time surveyors spend on live carriageways or hazardous ground
  • Generates digital terrain models and contours
  • Supports cut-and-fill calculations and earthworks design
  • Integrates with CAD and BIM design platforms

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Drone Topographical Survey FAQ

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