Unlike in traditional charts, the legend in a surface chart displays the colors or patterns for the areas that share the same range of values. Legend: The legend is an indicator that helps distinguish the data series.Giving your chart a descriptive name will help your users easily understand the visualization. Plot Area: This is where the visual representation of data takes place.This chart type is especially useful for finding the optimum results when comparing two or more sets of data.Ī surface chart mainly consists of 6 sections: The colors and patterns represent values within the same range. A surface chart plots data on a three-dimensional surface, in a similar way that topographic maps visualize elevation.