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
Single Link Loops	48 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.

To report an issue not currently listed here, please visit the 'Contact us' page on the OS website.