Adverse Possession is a doctrine under which a person in possession of land owned by someone else may acquire valid title to it, so long as certain common law requirements are met, and the adverse possessor is in possession for a sufficient period of time, as defined by a statute of limitations. 

A Topographic Survey is a survey that gathers data about the elevation of points on a piece of land and presents them as contour lines on a plot. The purpose of a topographic survey is to collect survey data about the natural and man-made features of the land, as well as its elevations. Product deliverable could include an accurate Map showing contour lines, physical features such as fence lines, buildings, trees, waterways, ponds, wetland, etc... also Digital Terrain Model (DTM) may be necessary for Engineers planning and development process. 

A Boundary Survey is a process carried out to determine boundary lines and define true property corners of a parcel of land described in a deed. It also indicates the extent of any easements or encroachments and may show the limitations imposed on the property by state or local regulations.

An ALTA (American Land Title Association) Survey may be requested or required by your lender or title company. This survey is much more detailed survey, and requires much more research. The added details and knowledge will help you determine any burdens, possible disputes or unknown issues that can come back to haunt you after a purchase. This survey will give you that extra peace of mind of knowing exactly what you are getting for your hard earned money. 

An Elevation Certificate may be needed for new construction, raising your house, or simply required to carry flood insurance, to ensure compliance with community floodplain management ordinances, to determine the proper insurance premium rate or support a LOMA (Letter of Map Amendment) or LOMR-F (Letter of Map Revision based on Fill).