OS MasterMap Water Network Layer Known Data Issues

This page provides the details of known data issues in the OS MasterMap Water Network Layer product. Once resolved, details of a known data issue will be held on the page until the next release of the

Live known data issues

Data Issue Name	Data Issue Description
Incorrect Level of Detail	21 772 Water Links have an unexpected level of detail value, for example, 'district' where they should be 'local'. This issue is being investigated by our development team.
Links with managednavigation = true	649 links are attributed as managednavigation = true in error. OS is not maintaining this attribute at present, so all links should have a value of false. This issue is being investigated by our development team.
Single Link Loops	40 instances of single-link loops in the water network where the first and last vertex for a link are the same. This issue is being investigated by our development team.