Compared with traditional raster data,MVT vector tiles have higher flexibility and scalability,and can store and transmit large-scale geographic information in the form of small files.MVT vector tile technology supports style control,allowing users to render maps with custom style sheets.The traditional vector slicing has problems such as long slicing time and redundant slicing data occupying storage space,so the slicing-free technology has become the future development direction.In this paper,a set of MVT vector tile slicing-free technology based on MapBox specification is designed by using PostGIS storage.When PostGIS storage technology is used to process map service requests,its access range is analyzed to determine whether there is corresponding tile data in the cache library to obtain the appropriate level of vector data in real time.The research results can provide technical support for massive vector data online map service.
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