Which total stations are used today in engineering surveys, and what fundamentally distinguishes them from one another.
In practice, we most often encounter two categories:
technical (electronic) total stations and engineering total stations.
Technical (electronic) total stations
These are direct descendants of optical-mechanical instruments. Since the late 1980s, they have featured electronic angle-measuring systems and laser rangefinders, which significantly sped up measurements and reduced the impact of human error.
These instruments are used for:
- axis layout;
- as-built and control surveys;
- topographic terrain surveys;
- road construction and general construction works.
As a rule, their accuracy ranges from 2″ to 5″, their functionality is oriented toward standard tasks, and their software is designed for fast, straightforward fieldwork.
These are the workhorses of most survey and construction sites, fully compliant with SP 47.13330 requirements.
Engineering total stations
emerged later — when the industry encountered tasks for which conventional total stations were no longer sufficient. These are no longer just measuring instruments, but part of an integrated measurement system.
Engineering total stations are used where the following is required:
- high-precision deformation monitoring of buildings, bridges, and industrial structures;
- near-real-time monitoring of shifts and settlement;
- alignment of process equipment;
- operation under complex and extreme conditions.
Their key distinguishing features:
- accuracy of 1″–2″ or better;
- automatic target search and tracking (auto-tracking);
- integration with GNSS and inertial measurement units (IMU);
- specialized software for monitoring and 3D modeling;
- extended range and resistance to external influences.
An engineering total station is used where manual monitoring is ineffective and the cost of error is too high.
Which brand of total station should you choose?
Base your decision on the requirements of your projects:
- for standard surveys and construction, excessive precision does not justify the cost;
- for industrial, infrastructure, and hazardous facilities, cutting corners on measurements can result in serious risks.
In conditions where satellite technologies operate unreliably, understanding the differences between types of total stations and making informed equipment choices have once again become an essential engineering competency.
