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Table 1 Point cloud properties obtained by TLS

From: Application of terrestrial laser scanning for detection of ground surface deformation in small mud volcano (Murono, Japan)

Date of measurement (YYMMDD) 110623 131205 141204
Terrestrial laser scanner used GLS-1500 TX5 TX5
Number of scan position 4 8 7
Internal registration errors for scan positions (mm) 4.0 2.9 7.9
External registration errors for time series (mm) 6.2 15.7
Number of points used 1,973,134 130,137,112 102,864,460
Point density (pt/m2) 385.6 15,516.4 16,253.3
Average point spacing (mm) 50.9 8.0 7.8