Mapping This encompasses utilizing surveys to piece together information acquired by the surveyor to produce visual maps of the land topography; or sometimes, for more complex needs, to show the layout of potential water flow or utility lines. These maps are then used to establish boundaries for ownership, proper building locations, common right of ways, and adherence to local codes from government entities. The mapping can be done either as a traditional maintenance item to keep record of the land information, or in advance of anticipated land development or sale of property as a due diligence item for legal purposes.