This paper introduces a new approach to extend iconbased visualization methods by using a mosaic-based paradigm. We discuss, how image metaphors closely related to the application domain can be applied for icon-based representations. Therefore, we enhance visualizations by well-known Image Mosaic techniques, such as image layouts, image selection and color adaption. Furthermore, we present the results of our approach by discussing an example of a clustered real-world climate data set. Keywords Icon-based Visualization, Mosaic-based Rendering, Climate Impact Research, Visualization Metaphors