POLYGON ((-0.171163831693931 51.54228088430968, -0.171313312249332 51.54285716350888, -0.171242304317338 51.54286913115526, -0.170912198361903 51.54281868210369, -0.17086358240003 51.54231828262971, -0.170893680412524 51.54229655114972, -0.171163831693931 51.54228088430968))