1. A method, comprising: performing, by a computing device implementing a map application, wherein said map application displays a map view of a map, wherein said map view is displayed based on preexistent map image data identified according to a virtual camera, comprising: detecting a velocity of the virtual camera; selecting the preexistent map image data for the map view of the map corresponding to a particular level-of-detail, wherein the particular level-of-detail is one of a plurality of levels-of-detail each corresponding to different respective map image data previously generated for the map view of a same area of the map, wherein the particular level-of-detail is determined according to the velocity of the virtual camera; and obtaining the selected preexistent map image data.