When You Might Need A Topographical Survey

By Author: Robert Armstrong
Total Articles: 2
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What is a Topographic Survey
Topographic surveys can be used to identify and map the contours of the ground and existing features above, below or on the earth’s surface. This can include sites featuring trees, manholes, buildings, retaining walls and utility poles. Topographic surveys generally concern the relief of the Earth, including natural and artificial hills, valleys, streams, dams and bridges. The recording of the particular terrain involves the determination of terrestrial or three-dimensional space. These recordings are used to outline the position of points, as well as the distances and angles between them.
A graphic representation of the relief of an area is known as a topographic map. This is constructed using the data found during recordings and shows certain horizontal and vertical locations plotted in the survey. Specialist topographic surveying equipment can show a 3D representation of the results. Depending on your project needs and requirements, this can include objects such as plants and buildings.

When is a Topographical Survey Needed
Topographical surveys are often used as a ...
... base map for the design of a resistance or building of some type, or design a road or driveway. In these cases, it is sometimes necessary to show perimeter boundary lines and lines of easements either on or crossing the area being surveyed.
Topographical surveys can gather useful information about the natural and manmade features of the land and its elevations. Topographic maps can be created in an office once the field data has be collected, or you can create your map in the field via a plane table.

Conducting a Topographic Survey
When conducting a topographic survey, you must first establish horizontal and vertical control that will act as the framework of the survey. In order to provide enough data for plotting during the mapping stage, you must determine enough horizontal location and elevation of ground points. These are sometimes referred to as side shots.
Depending on the project, locating natural and manmade features on the site may also be required. Once you have completed computing of distances, angles, and elevations, you can then begin drawing up the topographic map.

GPS Surveying
GPS surveying requires the use of a Global Positioning System (GPS). This is a satellite-based system which revolutionises the tasks of navigation and surveying. GPS surveying can be used with a wide range of traditional functions, including the establishment of geodic control, supporting engineering construction, cadastral surveys and map making.

Leave it to the Experts
Still unsure about which survey you need? Avoid making any mistakes and contact the experts today. Experienced, specialist surveyors are equipped with all the latest Trimble Robotic and GPS surveying units. A top quality surveying company will work with you to establish all your needs and requirements and provide you with a high level of detail and quality.

Sumo Services is a multi-disciplinary survey company. Their expert surveyors are committed to maintaining the highest possible standard in all aspects of their work. Contact them today and ensure your surveying needs are under control.Find out more