Journal article Open Access
Monika JÍLKOVÁ; Radek BARVÍŘ; Vít VOŽENÍLEK
The issue of graphic map load is currently very often overlooked. Conversely, having an objective knowledge of the level of a map load helps cartographers to assume the map’s readability and suitability for a target group of users. The aim of this study is, therefore, to use the Graphic Map Load Measuring Tool (GMLMT) and Subband Entropy script as objective metrics to evaluate the influence of terrain type (plains, hills, highlands, mountains, high mountains) and elevation representation method (contour lines, shading, colour hypsometry and their combinations) to graphic map load. The resulting map load values are visualized using multiple bar graphs and tables. Measurements performed using individual metrics confirmed the assumption that the map load of various terrain types differs the most when using contour lines. Hypsography using contour lines also reached the highest graphic map load among other methods. Hillshading and colour hypsography each also react specifically to increasing elevation differences. While graphic map load is increasing with increasing elevation differences, in the case of hillshading, map load seems to be more dependent on small terrain shapes and fragmentation of hillsides’ aspect.
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