An ALTA Land Title Survey is a detailed survey of real property that meets the specific needs of the American Land Title Association (ALTA) for title insurance purposes.
Members of ALTA require a survey that provides clear and distinct information about the property, including matters that may not be evident from public records, to insure title to land without exceptions.
A survey of real property must be acceptable to a title insurance company for the purpose of insuring title to said real property free and clear of survey matters.
Author's summary: ALTA Land Title Survey ensures clear property title.