Table 1 Point cloud properties obtained by TLS
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 |