A bivariate map displays two variables on a single map by combining two different sets of graphic symbols or colors. Bivariate mapping is an important technique in cartography. It is a variation of simple choropleth map that portrays two separate phenomena simultaneously. The main objective is to accurately and graphically illustrate the relationship between two spatially distributed variables. It has potential to reveal relationships between variables more effectively than a side-by-side comparison of the corresponding univariate maps.