Total Station, DGPS & Auto Level

Engineering Surveying using Total Stations & DGPS

Ground-truth engineering survey work on civil projects — Total Station, DGPS and Auto Level instruments in the hands of surveyors who establish the control network, capture every feature, and hand over documentation your design team can build on.

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Overview

From Control Points to As-Built Documentation

Every engineering survey we run starts the same way: a network of control points laid out around the site, in a position agreed with the project engineers and site supervisors beforehand — accessible and safe to work around, but placed where they will not be disturbed once construction begins.

From those control points, our surveyors work through the site methodically, measuring every feature, levelling at the required interval, sketching as they go and logging culvert and bridge inventory alongside it. Every observation is stored against a unique ID with its X, Y, Z and feature code, so nothing gets lost between the field and the office.

Back in the office, that raw data is processed, checked and turned into finished documentation — drawings, spreadsheets and word reports your design team can act on directly.

DGPS RTK Survey

Centimetre-Level Positioning

Differential GPS fixes the precise position of an unknown point by relating it back to a known one, via a baseline drawn between the two antennas. Because most GPS errors affect paired receivers almost identically, those errors largely cancel out once the data is post-processed — leaving a far more precise position than a single receiver could give on its own.

Where the project calls for it, that same correction can happen live, in the field, through Real-Time Kinematic (RTK) surveying rather than waiting for post-processing back at the office.

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Scope of Work

What a Topographic Survey Covers

The objective is simple: determine the X, Y and Z position of every ground feature against a defined reference system, so the resulting digital terrain model can support strip planning, design, rehabilitation and up-gradation work.

Fixing DGPS primary control points for XY control

Level traversing using Auto Level for Z control

Total Station traverse to fix secondary control points

Detailed topographic survey using ground control points

Preparing the topographic drawing in CAD software

Field verification against the draft output

Where It's Used