MLS to ALS matching

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MLS to ALS matching

MLS to ALS matching

This Chapter outlines example workflows for matching MLS data to ALS data. The ALS data is used as reference assuming that the positioning is accurate. The MLS data positioning may be inaccurate due to positional errors described in Section MLS project workflow. The MLS and ALS data sets may be collected at different points of time and cover the same area.

The described methods may also work for matching any point cloud to another reference point cloud. However, the most common case is probably that an older ALS data set exists and a newly collected MLS point cloud needs to be matched to this ALS data set. The methods are only suitable for improving the positioning of the newer point cloud up to the accuracy level of the older/reference point cloud.