# Align to GCPs

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The Align to GCPs tool automatically compute vertical residuals between GCPs and the pointcloud. These residuals will appear in the corrections window. Residuals/Corrections can be computed solely for analysis purposes, however they can be applied to the pointcloud as a rigid adjustment if desired. For a variable adjustment ("rubber sheet") in respect to GCPs, see [LiDARSnap with Ground Control](https://docs.phoenixlidar.com/spatialexplorer-8-and-9/user-interface/toolbars/workflow/lidarsnap-v4/ground-control-with-lidarsnap).&#x20;

For information on importing ground control into the project, see [Project->Ground Control](https://docs.phoenixlidar.com/spatialexplorer-8-and-9/user-interface/windows/project/ground-control-points-gcps).