OS OnDemand is available as either a Web Map Service (WMS), which allows your organisation to have a single view of our data, or a Web Map Tile Service (WMTS) which makes customising maps for your website much faster.
Web Map Service (WMS)
This is a simple interface for dynamically generating map images including layer(s) and areas of interest from a database.
Each request from the user is called a map transaction.
These take time to register, access the database and then create and serve raster tiles. OS OnDemand WMS does this in less than two seconds.
This is an interface that generates predefined map images from a cache.
Rather than having to get features from the database like the WMS, mapping application programming interfaces (APIs) use preconfigured and rendered map tiles. This reduces the time for seeing mapping to under 0.5 seconds.
The WMTS includes a consistently styled zoom map stack that enables easier interpretation of mapping between zoom thresholds.
The WMTS service option of OS OnDemand can be accessed using OGC WMTS Tile Requests, via the API and/or using XYZ Style Tile Requests.