UGCV5(MVT) is a kind of vector tile type in format of SuperMap UGC, which is compatible with the Mapbox vector tile specification, implementing quick loading and efficient caching of maps. And it can be rendered with richer styles on the client. For detialed introductions of Mapbox vector tile specification, see: https://www.mapbox.com/vector-tiles/.
The compact UGCV5(MVT) vector tile includes five parts:
- *.sci: Cache configuration file, which records the parameters information when generating caches by using the entire map, such as: cached map extent, map tiling scales, tile storage type, etc. It can be used to publish UGCV5(MVT) tiles as map services, see: Publish UGCV5(MVT) Tiles.
- styles: Used to store style files in JSON format, which is used to define the map style, including the data to be drawn, the drawing order, drawing method, and so on. For specification about style of Mapbox vector tile, see: https://www.mapbox.com/mapbox-gl-js/style-spec
- fonts: Used to store source font data.
- sprites：Used to store the icons used for drawing map in sprite image set, including icon set file (*.png) and metadata file (*.json) used to locate the icon. In addition, *@2x.png, which is used to display on high resolution screens, is contained.
- tiles: Used to store the data of vector tiles. The storage structure is that cached data under different scale level folders is stored as a set of files. The original cached tile format is *.pbf, the compact is *.mvt.