They do, but (like OS Maps) many are only updated once every few decades. Which means that they're great for physical features, but lacking when it comes to ma

They do, but (like OS Maps) many are only updated once every few decades. Which means that they're great for physical features, but lacking when it comes to man made features like paths, bridges, wind shelters etc. A secondary problem is licensing. Not all mapping agencies allow you to freely or easily download their maps onto a phone or provide enough metadata to allow you to do things like routing etc.