Quality and applications of laser scanning for civil engineering

Hannu Hyyppä



Advances in laser scanning technology have challenged the conventional measurements in urban and rural environments. The laser scanning is capable to provide 3-dimensional information of the surrounding environment for topographic surveys with an accuracy equivalent to traditional land surveys. Laser scanning has entered into civil engineering where it has been developed as the response to the need of a wide range of users for up-to-date digital elevation models.

                     
 
The main objectives of the research project are


Ground truth data was recorded with the Finnish Geodetic Institute in the test site in Otaniemi. In order to verify the accuracy of  laser points in Otaniemi, coordinates of reference points were measured using RTK (Real-Time-Kinematic) GPS receiver. RTK will be mainly applied for accurate reference data collection, because of the accuracy, which is centimeter level. Horiziontal accuracy of the RTK was verified to be about 0.015 m and vertical accuracy 0.02 m.

    
  

Laser data acquisitions – Laser scanning campaigns with TopEye and Toposys.
 
The project is funded by the Academy of Finland. Other research partners of the project are Finnish Geodetic Institute/Department of Photogrammetry and Remote Sensing and Finnish Consulting Engineers Ltd, Sito.