Terrestrial Laser Scanning Data Integration in Surveying Engineering

Abstract

In terms of sensitivity and equipment, there are several differences between Close Range Photogrammetry (CRP) which is today often used for documentation of historical and cultural structures, restoration, relievo studies, and Terrestrial Laser Scanner (TLS) technology which is recently started to be used for 3D modelling of every kind of objects and geometric data acquisition. Terrestrial laser scanning is a new technology that enables easy and fast data acquisition from objects with complex structures such as buildings, machines, etc. In recent years, some manufacturers designed and improved different systems for specific purposes [4]. The combination of terrestrial image photogrammetry and CRP method, which is also a new technology, provides us new opportunities in presentation of 3D photorealistic models, classification of real objects and creation of visual reality [9]. TLSs usage becomes more popular day by day since they present quick and effective solutions in the way of acquiring 3D geometric information on objects. Some of the significant study areas that benefit from TLS are as follows: • Archeology, • Architectural restoration studies, • Measurement of tunnels and roads, • Urban modeling, • Virtual factories, applications of virtual reality, • Mining and infrastructure projects, • Manufacturing controls, • Crime scene investigations, • Studies of industrial design, etc. We can consider CRP and TLS as either independent methods or two complementary methods; therefore their area of application broadens day by day. If TLS and CRP are compared with Laser Scanners; • 3 dimensional points can be acquired directly • Intense point cloud data can be obtained within the frequency of millimeters, in a short period • Smooth data acquisition over difficult surfaces in terms of their form