1512-1594. Latinized form of the name of the Flemish map-maker Gerhard Kremer. He devised the first modern atlas, showing Mercator's projection in which the parallels and meridians on maps are drawn uniformly at 90 degrees . It is often used for navigational charts, because compass courses can be drawn as straight lines, but the true area of countries is increasingly distorted the further north or south they are from the equator. For other types, see map projection.