Table 1.

A set of displacement measuring techniques.

Measuring Techniques	Accuracy	Test Type	Bridge Class	Test Costs
Inclination	<cm	Static/dynamic	large rigid frame	low
Leveling	<mm	Static	no limits	low
Interferometry	<mm	Static/dynamic	no limits	expensive
Global Positioning System	cm	Static/dynamic	large span	average
Terrestrial laser scanning	<mm	Static	medium or small span	expensive
Connection pipe	<mm	Static	no limits	expensive
Electro-optical imaging	mm/cm	Static/dynamic	large span	average *
Computer vision	mm	Static/dynamic	large span	average
Tachymetric	mm	Static/dynamic	no limits	low

* Depends on used instruments.