The main method of identifying and representing the location of geographic features on the landscape is a map . A map is a graphic representation of where features are, explicitly and relative to one another. Quite simply, a map is a model of the real world. The map legend is the key linking the attributes to the geographic features. This implies loading the attribute data into a database system and linking it to the graphic features.
Maps are simply models of the real world.
They represent snapshots of the land at a specific map scale. The map legend is the key identifying which features are represented on a map. For geographic data, often referred to as spatial data , features are usually referenced in a coordinate system that models a location on the earth's surface. The coordinate system may be of a variety of types. These are usually referred by degrees, minutes, and seconds.