Modify L(Link) fields
The L-Field contains a location.
The input is latitude (°), longitude (°), altitude (m) and precision (km).
See XLField Class to find an example on how to increase the latitude by 1, setting all unknown altitudes to 100 meters and setting all unknown precisions to 5 km.
See XLLinkField Class to find an example on how to use LoadTargetRecord to get values from linked field.