[GIS] a chart with points scattered on it, often used to check the accuracy of the attribute data
[statistics] a diagram plotted with points decided by pairs of values(x,y) is called scattergram or scatter diagram . It presents how strong the relationship between these two variables. If a straight line is drawn through the points, and the points scattered closely around the line, then we can draw a conclusion that there exists a strong linear relationship between these two variables.