What is that nail for?

Most surveyors use reference marks for their equipment while surveying a particular property.  These reference marks can be nails, iron stakes, iron pipes, etc., but most of the time they are of a temporary nature.  Surveyors use these reference points to set up their equipment on to locate points that are needed.  There is no reason to be alarmed if you notice these reference points on your property or your neighbor’s property.  Most of the time the only person that these reference points mean anything to is the land surveyor surveying the property.  But always feel free to ask a surveyor what that point is for to make sure that there is not a problem.