Surveying

Measuring the Earth — distances, levels, angles and coordinates. Every civil project begins and ends with surveying: mapping the site, setting out the design and checking what was built. Learn chain and tape surveying, levelling, theodolite traversing, total stations, GPS/GNSS and GIS — from basic field methods to modern digital workflows.

• Chain Survey — Chain and tape surveying measures horizontal distances and simple areas. Learn equipment, ranging, offsets, tape corrections (temperature, tension, sag, slope, standardisation), errors, and area computation by the trapezoidal and Simpson's rules.
• Leveling — Levelling determines heights (reduced levels) of points. Learn datums and bench marks, the dumpy/auto level and staff, backsight/foresight/intermediate sight, height-of-instrument and rise-and-fall methods, arithmetic checks, misclosure, curvature and refraction, and contouring.
• Theodolite — The theodolite measures horizontal and vertical angles. Learn instrument parts and temporary adjustments, face-left/face-right observation, bearings (whole-circle and reduced), traverse computation (latitudes, departures), closing error and Bowditch adjustment, and trigonometric levelling.
• Total Station — A total station combines an electronic theodolite with an EDM and a computer. Learn how EDM works, slope-to-horizontal reduction, coordinate computation, atmospheric and prism corrections, stake-out, resection, robotic and reflectorless operation, and data workflows to CAD.
• GPS/GNSS — Global Navigation Satellite Systems (GPS, GLONASS, Galileo, BeiDou, NavIC) give positions anywhere on Earth. Learn how ranging and trilateration work, error sources, DOP, differential and RTK positioning, static surveys, datums, ellipsoidal vs orthometric heights and the geoid.
• GIS — Geographic Information Systems store, analyse and visualise spatial data. Learn vector vs raster data, coordinate systems and projections, attributes and databases, spatial analysis (buffer, overlay, network, terrain), remote sensing inputs, and GIS for planning, utilities and disaster management.