Hi: We have a large scope of map data which are published by wmts. But they are deployed at the different server, Each server hold a part of the data. And we use the bbox to define the extent of the provided data.
For example, 0,0,20,20 ==> http://server1/wmts.. (this means data inside the bbox of (0,0,20,20) should request the data from server1. 20,20,40,40 ==> http://server2/wmtsservice... And each server will have a different `Attribution` which should displayed inside the map. Now I wonder how to make them work together. I have two ideas now: 1) create one wmts layer. Then listen the `moveTo` event of the map, then change the url and attribution of the layer accordingly. 2) create each wmts layer for each server, of course the layer will have a `tileFullExtent` property. Then I think OL will load the layers accordingly(layers whose extent are outside of the current viewport will not be loaded). Is this possible? If manner 2 is possible, I wonder which is better with performance considered?
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