– M –
The angle between magnetic north as shown by the needle of a compass and true north.
A two-dimensional representation of a piece of three-dimensional space.
A collections of maps sometimes grouped by a common theme. Map galleries are a popular method of showcasing. You’ll often find them at Geography related conferences. Ever increasing are online map galleries.
A method used to represent the 3-dimensional surface of the earth or other round body on a 2-dimensional plane in cartography (mapmaking). This process is typically, but not necessarily, a mathematical procedure (some methods are graphically based).
The art of interpreting or understanding the information conveyed by a map.
The use of maps and cartography to promote a specific (and often political) agenda. See the post on Maptivism.
Two or more images taken simultaneously, but each image taken in a different part of the electromagnetic spectrum.
GIS Acronyms that start with M
MAPPS – Management Association for Private Photogrammetric Surveyors
MIS – Management Information System
MERLIN – Maryland’s Environmental Resources and Land Information Network
More geographic concepts from the GIS dictionary: