These contours lines have a 10-metre interval with an index every 50 metres. Each contour contains a value.
Schema
The schema of the feature type describes the "returnables" and "receivables". "Returnables" are feature properties that are returned in responses to a query. "Receivables" are feature properties are feature properties that have to or can be provided by the client in mutation operations (create, replace, or update). Unless otherwise specified, a property is both a returnable and a receivable.