The Cartesian coordinate system is a system of coordinates that uses a pair of perpendicular lines to define a point.
A cartogram map is a map in which the size of geographic features is distorted in order to convey information other than geographic position.
The point within a geometric figure, at which the figure's entire mass seems to be concentrated
A map that uses color to represent different values within a data set
A British public body that is responsible for the management and conservation of coal resources in England and Wales
A file format that stores data in a tabular format, with each row representing a new record and each column representing a different field