Snake Projection

The Snake Projection is suited for engineering purposes due to its low distortion characteristics.

[7] The Snake Projection is the engineering coordinate system used for a significant proportion of primary rail routes in the UK,[8] including that of the HS2 London to Birmingham high speed line.

[9] For the London to Glasgow West Coast Main Line the distortion in the Snake Projection used is no greater than 20 parts per million within 5 kilometres of either side of the track.

[10] The Snake Projection algorithm converts between geographical and grid coordinates, however the method of technical implementation can vary.

[7] The global EPSG geodetic coordinate system database features several snake projection definitions through the NTv2 approach.

Generating a trend line of zero distortion that follows the route of a long and linear project