Maps from Sparse Geospatial Data Tiles

摘要

Existing map solutions using tiled maps with geographic data in vector format typically has such a volume of data that not all geographic data can be stored in memory. A primary bottleneck for map rendering speed in such solutions is the time needed to load all data necessary for replacing one rendered map with the next rendered map. Utilizing the structure and methods of the invention herein when loading geographic vector data, the average time to load all necessary geographic data needed for one rendered map to the next will be greatly reduced—the loading time reduction will be especially large when pan and zoom operations are the main transitions from one rendered map to the next.