This type of survey may be required by a governmental agency or may be used by engineers and/or architects for the design of improvements or developments on a site. A topographic survey map will show the location of natural and man-made features including buildings, curbs, sidewalks, trees, landscape areas, streams, rock outcroppings, manholes, catch basins, fire hydrants, etc. The map will also show contour lines and/or spot elevations. Property lines will usually be shown for reference purposes and elevations may be relative to a published vertical datum or an assumed local datum. Easements of record can be located with respect to the boundary and plotted on the map if the client provides a Title Report.