I have a very large shape/geojson file with around 150 polygons. Some polygons has as many as 2700 points! This is overkill for my purpose of rendering outlines on a mobile device and I would simply like to downsample to a less fine resolution.
Is this possible and if so, what software to use? I have tried doing it manually (by dropping decimal places and eliminating duplicates) but I am not sure if I trust the result.