Class VectorTileFactory

Vector Tile Factory Vector data is much more detailed compared to terrain and image data so we have a different structure to process vector data(compared to other factories). First of all, how does the vector data itself structured? Vector tile data contains 'vector layers' as immediate children.And then each of these vector layers contains a number of 'features' inside.I.e.vector data for a tile has 'building', 'road', 'landuse' etc layers. Then building layer has a number of polygon features, road layer has line features etc. Similar to this, vector tile factory contains bunch of 'layer visualizers' and each one of them corresponds to one (or more) vector layers in data.So when data is received, factory goes through all layers inside and passes them to designated layer visualizers.We're using layer name as key here, to find the designated layer visualizer, like 'building', 'road'. (vector tile factory visual would help here). If it can't find a layer visualizer for that layer, it'll be skipped and not processed at all.If all you need is 1-2 layers, it's indeed a big waste to pull whole vector data and you can use 'Style Optimized Vector Tile Factory' to pull only the layer you want to use.

Method to be called when a tile error has occurred.

Set up sublayers using VectorLayerVisualizers.