XY graph refers to a simple two parameter plot where one value is associated with another. Cost versus Cleanup and correlation models are examples of simple XY graphs. Typically, if the value of one variable is a function of the value of the other variable, the independent variable is placed on the x axis and the dependent variable is placed on the y.
SADA also can overlay geospatial maps with layers from external GIS systems. See Set GIS Overlays.