1. A computer-implemented method, comprising: receiving hierarchical information for nodes at different hierarchical levels; generating a graphical tile for each node; arranging graphical tiles for each hierarchical level into graphical layers; arranging the graphical layers in a vertical stack; presenting, in a user interface, a three dimensional orthographic projection view of the stack of graphical layers, wherein the stack of graphical layers each has multiple graphical tiles on a display; and moving a graphical layer to a top layer of the vertical stack when selected.
1. A computer-implemented method, comprising: receiving hierarchical information for nodes at different hierarchical levels; generating a graphical tile for each node; arranging graphical tiles for each hierarchical level into graphical layers; arranging the graphical layers in a vertical stack; presenting, in a user interface, a three dimensional orthographic projection view of the stack of graphical layers, wherein the stack of graphical layers each has multiple graphical tiles on a display; and moving a graphical layer to a top layer of the vertical stack when selected. 3. The computer-implemented method of claim 1 , comprising modifying a visual characteristic for graphical tiles representing child nodes when a graphical tile for a parent node is selected.