I find that manually inputting the data, is the last alternative.
Network Atlas 1.11 was released as a part of Orion Platform 2014.1. Version 1.19 went out with 2018.4. There were some breaking changes, but if that map was part of Orion installation (was in DB) during upgrade, it should have been automatically updated to be compatible with newer version of Network Atlas. If that didn't happen, feel free to open a support ticket.