/usr/share/games/netpanzer/maps/Duell.spn is in netpanzer-data 0.8.4.debian.1-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3
SpawnCount: 2 Location: 29 44 Location: 95 41