A Topographic Survey determines the positions of natural & man-made features and configuration of the terrain on a particular piece of land. The elevations of the measured points are represented as contours and spot elevations on a drawing. The finished drawing shows the location of all visible improvements such as roads, driveways, buildings, walls, fences and sidewalks. The survey also shows any above ground evidence of utilities such as manholes, valves and fire hydrants. The inverts of all sanitary sewer and storm drainage structures are also measured and shown on the survey. The scope of survey can be broadened to include a more intensive Utility Survey. Trees are generally not located unless a Tree Survey is specified by the client.