Metadata are key for linking geospatial information, maps and general information.
A geospatial network node shows the concept of metadata maintenance and links to relevant registries.

Spatial Data Services establish standardized interfaces for accessing data in service oriented procedures

The following servers are used for various courses at universities to put hands on these spatial SOA concepts.

Styling and cartographic expression allows to make sense of delivered geoinformation and supports geospatial knowledge building. 

The following link to a Maputnik instance allows to create individual styles in JSON format, which are adopted to vector-tiles.