GPS (Global Positioning System) is a satellite-based positioning and navigation system owned and operated by the US Department of Defence.
Access is free for all users and the service is available 24 hours a day, 365 days a year. GPS is an all-weather system that works anywhere in the world. GPS can give an instantaneous, real-time position to within approximately 10m using a single handheld receiver, and by using a Dual frequency GPS it is possible to achieve accuracy to about 1cm. The procedure for establishing the GPS points for a project is detailed in the steps below.
- Identify any safe and undisturbed locations for establishing the GPS points along the project site. Preferably not greater than 5km Radius.
- Always select a pair of points which are clearly inter-visible, so that it will facilitate the Traverse survey.
- All the GPS points shall be established on a monument (A concrete pillar erected with specified dimensions with a metal plate on the top with punched point)
- The first point of observation shall be possibly at the centre of the entire project. This point is termed as SPP (Single point processing) and shall be observed at least for a duration of 24 hrs. This ensures that further GPS points will be well in the coordinate system or world grid system.
- Further, all other points are observed one after another by using static methods (Real time kinetic and kinematic) or dynamic methods as per the requirement of the project.
- These points will be observed with the minimum conditions like, least obstruction for observation (large trees, Huge buildings), at least 4 Satellite information during observation.
- The field data collected is processed to extract the exact location of the points in terms of UTM (Universal Transverse Mercator) Co-ordinates and also in the terms of Latitude and the longitude of the points.
We offer rental services of DGPS along with an operator.