Instituto Hidrográfico de la Marina (Hydrographic Institute of the Navy IHM), Spain

Instituto Hidrográfico de la Marina (Hydrographic Institute of the Navy IHM), Spain is an institution responsible for hydrography, geodesy, photogrammetry, cartography, navigation, and oceanography. It plays a crucial role in ensuring the safety of navigation by producing and distributing nautical charts and related publications. The IHM is also involved in scientific research and represents Spain at the International Hydrographic Organization (IHO). Its headquarters are located in Cádiz.