Minecraft wiki entry for Achievement_guide, associated text: First, you need to sell some paper and buy some empty maps from a novice-level cartographer villager, when the cartographer reach apprentice-level, buy a lot item frames and sell several glass panes. When cartographers reach journeyman-level, it's important to see what their offer. If the cartographer sells woodland explorer map or ocean explorer map, buy it which costs 12 emeralds and a compass. If the offer is an empty locator map, that means you must trade with another cartographer. To craft glass panes