images map that are smooth, and then to see the more details of the map when zoom in, that can see details intact when the zoom in image map. The zoom in maximum is 1 pixel.
Vector tiles files, this is a new technology for cut vector data into many small tiles and send vector data. Fewer of coordinate point to reduce storage of tiles makes use storage to store fewer. Which the map image that is not smooth and there are no details shown. To see the more details of the map when zoom. The map will be more smooth and show more details while zoom in.