Topographic Surveying

A Topographic Survey is considered the first step of a rigorous site investigation, providing a reference framework on which all subsequent investigation can be based. Rather than surveying the site in isolation our surveys are related to Ordnance Datum & National Grid co-ordinates. Project surveyors process their own data, gathered from site personally and create 2D or 3D drawings; we do not pass on to a CAD department to be edited by someone who has never seen your site. Sites are surveyed and priced on a daily basis with crews available for major utilities developments, residential or highway surveys, through to land undulation surveys for example to improve irrigation planning and environment agency requirements.

Topographical surveys are the main tools that engineers have to design and manage drainage.? Town and Country Surveyors does topographical surveys for clients with small lots?as well as for clients properties?in excess of several hundred?acres. Properties that have significant tree cover can be accurately surveyed by the use of a technology known as?LIDAR.? Town and Country Surveyors has partnered with a lIdar company to create first order topographic surveys of property in excess of several hundred acres.??This work is generally done for clients who are engineers or planners?designing?planned developments?which contain?subdivision.

CSM has assisted many engineering firms in the design and construction of sewer/water mains, water/sewer plants, streets, bridges, airports, landfills, parks and drainage improvements.

A topographical survey is a survey showing the elevation differences of the property.? This will normally show any permanent improvements as well, trees ( type and size ) are requested too. This is normally a?preconstruction item and is used to plan dirt work and house or structure positioning to save trees and understand the lay of the land.

Topographical surveying means locating all improvements and topographical features such as: elevations of the land, embankments, contours, trees, water courses, roads, ditches, utilities, etc. This survey can be used in conjunction with a Location Survey in order to prepare a Site Design Map, a Subdivision Map, or an Erosion Control Map.

The purpose of a Topographic survey is to gather survey data about the natural?and man-made features of the land, as well as its elevations. From this information a three-dimensional map may be prepared.?The topographic map is prepared in the office after collecting the field data or it may be prepared right away in the field by plane table. The work usually consists of the following:

  1. Establishing horizontal and vertical control that will serve as the framework of the survey
  2. Determining enough horizontal location and elevation (usually called side shots) of ground points to provide enough data for plotting contours when the map is prepared
  3. Locating natural and man-made features that may be required by the purpose of the survey
  4. Computing distances, angles,?and elevations
  5. Drawing the topographic map.

Topographic surveys are commonly identified with?horizontal and/or vertical?control of third- and lower-order accuracies.