The Zelda: Breath of the Wild community is already huge and a lot of guides and tips come up online to help you complete the game at 100% (Cooking and Elixir Recipes, Armors and Outfits, Fairy Fountains). And if all this isn’t enough, you should definitely take a look at what Hyrule Legends and Zelda Universe are working on right now: an interactive map of Hyrule.
It’s in alpha at the moment but you can already find a lot of content, like shrines, sidequests and collectibles. The team are even about to implement 3D models to use for future versions, and they even want to do something like the Google Map’s Street View functionality. There’s also a Reddit thread about the project and if you want to give a hand, there’s a Google Form to suggest point of interests to be added on the map.