SnakeGrid
The SnakeGrid software converts between ellipsoidal coordinates (derived from GPS, for example) and a specially designed grid system for a particular project that keeps the scale factor close to unity within a few kilometres of the railway, road or pipeline that it is designed
So for example a control survey can be carried out with GPS, and then these coordinates converted to the chosen SnakeGrid system. Then any survey or design work carried out using these control points can make a “flat Earth” assumption – however many hundreds of kilometres the project extends for. No projection scale factor or reduction to ellipsoid corrections need be applied.
More details of the actual software that is supplied to client are given below. We can also work with clients to develop other applications that incorporate the SnakeGrid application as a DLL – for example in a software package that transforms CAD or raster data from specific national coordinate reference frames.
Severn Partnership has commissioned eight SnakeGrids for several of its clients – inc. Fugro BKS, who undertook aerial mapping of the 267 km twin track mainline between Dublin and Cork
Mark Combes BSc, Dip Svy, MRICS, MinstCES
Managing Director Severn Partnership.
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SCS Computer, Ireland, has collaborated with SnakeGrid to create a solution based on a tablet PC using the existing version of SnakeGrid. Efforts are also on to develop solution for scenario where Rail companies are using slightly older Leica 1200 receivers with RX1250 controllers, as they could get the SnakeGrid functionality without having to purchase or change their survey hardware.
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