Hierarchies of plane graphs, called graph pyramids, are used for collecting, storing and analyzing geographical information based on satellite images or other input data. Important for the better understanding of the geographical data, like landscape properties or thematical maps, is the appropriate visualization of graph pyramids and related information. In this paper, we present an interactive visualization tool that supports several coordinated views on graph pyramids, subpyramids, thematical maps, etc. Furthermore, some implementation details and application results are discussed.