The coordinate grid system was created by the French mathematician Rene Descartes.
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Grid Compass was created in 1982.
1,000 meters
A grid reference system, also known as grid reference or grid system, is a geographic coordinate system that defines locations in maps using Cartesian coordinates based on a particular map projection. Grid lines on maps illustrate the underlying coordinate system.
Meridian
A graph is like a bar chart and a grid is like a table they are different ways of presenting information like you where recording a what a lesson was called you would put it in a grid because its a word and you cant record words in a graph because you would usually use numbers for a graph.