When playing Eco I noticed that the Ore Location guides floating around aren't super accurate. So I decided to make my own version. This one uses WorldGenerator.eco.template from the game files and simply aims to visualize the information there in a readable way.
I did notice a few inconsistencies in the game data provided: For example some biomes have gaps, some don't extend all the way down to 100. This tool won't try to interpret or reverse-engineer the data to figure out these inconsistencies and only display what the game gave me.
From everything I've seen (so far) all the blocks that show up here can be found in those locations in the real game.
Select a biome on the left to start!