The folowing web mapping application uses the ESRI ArcGIS Server JavaScript and extends the TiledMapServiceLayer for the base mapping and the DynamicMapServiceLayer for the overlayed map..

For full details on how to extend a TileMapService and integrate OS Open Space , you can refer to my blog.

In this example, we have integrated the new BGS (British Geological survey) WMS.

Change BGS Geology layer transparency (0.3)

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