This allows the surveyed information to be tied in with other mapping products which are also aligned to a national grid system. Topographical surveys (sometimes referred to as “topos”) record a range of information on site and are usually referenced back to a national grid co-ordinate system. Modern equipment such as robotic total stations allows surveys to be undertaken by a surveyor without the need for an assistant! The devices used for the survey are very precise and usually require on going calibration to ensure their reliability. These positions can then be utilised when setting out the new design so that elements such as foundations, brickwork, new trees etc are place in the correct position.Ī Topographical survey is typically undertaken by a land surveying company who utilise a range of high-tech equipment such as GPS devices, total stations and 3D scanners to accurately and quickly survey areas of land such as fields, woods, marsh, urban areas and more. A topographical survey will leave a number of fixed reference markers on site such as nails in concrete. Too close to a boundary which may cause issues with council permissions.Īnother benefit of a commisioning a topographical survey from the start of a project is that it will make the setting out engineers job much easier.Next to large trees which may cause issues with ground swell / roots.Close to a watercourse / drain and prone to flooding.Position and height data recorded by the survey can help prevent costly problems such as building in unsuitable areas.Īn example of an unsuitable area which could be revealed by the topographic survey include: The drawings and information produced by the survey work are used as a base to design from.Ī topographical survey is a crucial component of a successful construction or engineering project. Topographical surveys are utilised by a range of professions including architects, engineers, building contractors to effectively visualise, plan and develop their projects. The recorded data is used to create a range of information such as CAD drawings, contour maps, terrain models and more. A topographical land survey accurately measures, and records position and height data for man-made / natural features within a defined survey area.
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