A more thorough explanation:

The National Imaging and Mapping Agency (NIMA) is a department in the United States Department of Defense. Its main responsibility is to provide the military and intelligence officers with accurate and current geospatial information. This information is usually in the form of maps, charts, and photographs.

For example, NIMA may provide the military with a map of a specific area where they are planning to conduct a mission. This map will show the terrain, roads, and buildings in the area. NIMA may also provide intelligence officers with satellite images of a foreign country to help them gather information about potential threats.

NIMA's work is important because it helps the military and intelligence officers make informed decisions based on accurate and up-to-date information. This can help them plan and execute missions more effectively and keep themselves and others safe.