Download patch
ref: bfd9f617c96af851ad4100b752ea967ef8989edc parent: 70eac3a1f7a27d5b71b968708f423dbbff6b146c author: Rangi <remy.oukaour+rangi42@gmail.com> date: Mon Aug 31 06:23:19 EDT 2020
Use constants to delineate map types, and factor out more data