GPS Surveys
Tuesday, August 26, 2008
GPS (Global Positioning Satellites) allow us the ability to complete surveys in real time without pre and post processing being a necessity. More details of the equipment we use can be found on our GPS Surveys page.The introduction of satellite equipment to the world of surveying has increased the speed in which we can complete a particular job, although there are limitations, especially if the work is being done in an wooded area. The accuracy with GPS surveys is generally around +/- 20mm whilst we are able to further increase this by observing satellites over a fixed point for a prolonged length of time as this gives us the ability to make certain corrections which would be otherwise impossible.
The main advantage of using GPS surveys as opposed to more traditional methods comes because we no longer need a line of sight to exist between the two points, so we can set everything up and then collect coordinate data across many miles in one day. In some cases we are able to complete the entire site survey in one day.
One of the most useful applications for GPS surveys is in the assessment of flood risk. Any planning process will require an FRA handing in to the Environment Agency; we are able to create an image which sits on existing Ordnance Survey maps and which include routes of safe access and egress.
Labels: gps surveys
