一种工程矢量瓦片地图加密和压缩策略研究OACSTPCD

We proposed an encryption and compression strategy for engineering vector tile map in order to avoid over fitting and poor data securi-ty in the process of compressing and encrypting engineering vector tile map information.We set the engineering vector tile pyramid model param-eters based on MBTiles,traversed and analyzed the tile data sets,and hierarchically indexed the tile maps.Then,we utilized a tile map informa-tion compression algorithm based on the upper limit of features to handle possible over fitting situations during the compression process,and ap-plied the RSA algorithm to improve block chain technology,strengthen the connection between various blocks,transcode vector tile map informa-tion,and achieve effective storage of tile information.The experimental results show that①after compressing tile map information using this model,the maximum storage time is 0.9 s,and the storage space value is less than 4 TB.②After encrypting the map information,the map infor-mation features are completely disrupted,which can effectively avoid overfitting during the compression process,reduce information storage time and space consumption,and achieve good information compression and encryption results.