Information is key for a safe deployment of the fire brigade. Incorrect judgement could lead to decreased effectivity or even casualties. Because of the risks that are posed by building complexity and modern building materials, the Dutch fire brigade is increasingly hesitant to enter the building during a building fire. While no two building fires are the same and personal judgement of the fire brigade will remain necessary, good information supply could aid the commanders in making the right choices. There are a lot of factors that come into play when choosing strategy, tactics and techniques. An effective information system should present the right and up to date information at the right moment, and it should do so in an intuitive and effective manner. Most cartography research has been done for outdoor applications; indoor cartography is in its infancy. This research aims to develop cartographic methods to aid the Dutch fire brigade during building fire deployments. Based on the requirements of the organization a novel approach is introduced: ToggleMaps. This mobile interface combines a main map pane with a reference pane, both in either 2D or 3D and with either a low or a high level of detail. This allows the user to toggle between two states: a detailed 2D overview of a separate building level with its perspective within the 3D reference map, or a more detailed 3D overview of the whole building with a simplified 2D reference map of his current building level.@en