Basic Survey

Explore surveying fundamentals, measuring the relative position of points on and beneath the earth to create maps and plans, including leveling and contour mapping.

Apply the principle to guide survey work, using a systematic approach to search large areas and then smaller towns, to prevent errors and improve precision.

The lecture explains how to locate points in survey by making two independent measurements using reference points and linear relations, enabling determination of a point’s position in the world.

Learn surveying for topographical maps, boundary and engineering plans, and infrastructure alignment of roads, railways, and pipelines; study elevations and drone distance meters, hydrographic and city surveys.

Compare plane surveying, which ignores earth curvature for small areas less than 250 kilometres square, with geodetic surveying that aims for greater accuracy on larger areas.

Explore the classification of surveying by object, instrument, and method, including chain-based linear measurements, angular measurements with magnetic or prismatic compasses, plane table surveying, tachometer distances, and levelling.

Explore photogrammetry as a major measurement method using aerial photographs and triangulation through a network of triangles, to conduct geological, mining, archaeological, military aerial, and land surveys.

Explore how plans and maps use scale to represent large distances, using the ratio of map distance to ground distance to distinguish large, medium, and small scales.