Organization Tile Map Data Based on Nested Pyramids Model

An improved nested pyramids model is proposed,and designing principles and constructing methods are elaborated while taking double pyramids nested as an example.The tests show that the program fully inherits the advantage that pyramid model demonstrates rich spatial information through multiple levels of details,and effectively enhances the coherence when switching among the scales in the model,also supplementing and optimizing the method in organizing tile map data based on pre-production technology to some extent,providing a new idea for a specific approach to construct pyramid model.