Research On Key Technology Of Quick Copy And Random Accessing Of Massive Map Tiles
Pengfei Liu, Qian Wang, Zun Wang, Hu Zhang, Song Yiquan · 2019
This paper, inspired by mbtiles format which was provided by MapBox, proposes a method on copy of massive map tiles by combing the whole web map tiles into a series of single huge files. Firstly, the map tiles of the same zoom level are packed into a single map file and head file with the extension of .tiles and .tilehead respectively; then create a single sqlite database named sqlint.db3 by the all .tilehead files to provide high efficiently random accessing. Experiments, take the Google Map Tiles as examples, proves good results on copying the tiles into SD cards for mobiles phones. And also the random accessing of tiles from file system directly and from the huge tiles file are also proved that the method has no obvious difference.