Gfeller, RaphaelHauser, PascalZiegler, JürgenSchmidt, Albrecht2017-11-222017-11-222010978-3-486-70408-2https://dl.gi.de/handle/20.500.12116/7101Heatmaps are not only used for visualizing air temperature over an area, but also for visualizing vital information such as avalanche and flood danger. Regular heatmaps map the value of the visualized variable at each point of the map to color from a given color spectrum. One popular color spectrum for heatmaps is the red-green spectrum. However, this is also the most problematic color spectrum because red-green color blindness quite frequent. Other color coding schemes affect smaller populations, but the general problem still exits. In this paper we present an alternative visualization of heatmap values which relies on angular shading. We show that the efficiency of this method is equal to the standard method for people without color blindness, and people with color blindness can still interpret the map. The fact that Rotated Line heatmaps can be read by people independent of their individual color vision deficiency, makes this heatmap representation technique particularly useful for public information displays.enText/Conference Paper