SOTA Activation Zone Plotter

This tool was inspired by the activation zone tool created by N6ARA.

This tool here uses the Ordnance Survey terrain 50 data. This gives 10 m interval contour polylines, allowing activation zones to be drawn onto a 1:25k OS map, at to a 10m resolution. If OS data is not available for a summit, the search will fallback to the N6ARA API

Pleas Note: when using OS data ONLY, the activation zone is rounded up to the contour nearest the summit. So the actual activation zone could be slightly larger. I wanted to be on safe side for any plotted activation zone

This tool is not fully validated and so must be only used as a guide.