This document discusses a project to develop a web service called Geo Arable field Optimisation Service (GAOS) that helps optimize field geometry and operations for farmers. The GAOS uses algorithms to analyze field boundaries and calculate the best swath patterns for tasks like planting and spraying that minimize unused areas and costs while considering factors like turning requirements. Over 20 farmers participated in a trial that found the optimized geometries improved revenues and margins. Current work is focused on improving the stability of the system and better supporting complex field shapes and operations like curve-following tractors.