Our systematic test series have proven that different materials –
especially building materials – may have significant influences
on the measurements of terrestrial laser scanners, partly higher
than the basic accuracy of the scanner itself. Some general
conclusions can be drawn: No constant or functional relationship
for the range correction value d for all materials could be
found. It varies – according to Clark and Robson (2004) –
dependent on distance and reflectivity about 1mm – 3mm, so a
range correction seems to be appropriate only for applications
of high accuracy requirements. The standard deviation σR of
range measurements increases systematically according to the