/usr/ is in libsiscone-spherical-dev 2.0.6-1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/libsiscone-spherical-dev/
/usr/share/doc/libsiscone-spherical-dev/copyright
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/libsiscone_spherical.a
/usr/include/
/usr/include/siscone/
/usr/include/siscone/spherical/
/usr/include/siscone/spherical/geom_2d.h
/usr/include/siscone/spherical/hash.h
/usr/include/siscone/spherical/split_merge.h
/usr/include/siscone/spherical/vicinity.h
/usr/include/siscone/spherical/momentum.h
/usr/include/siscone/spherical/protocones.h
/usr/include/siscone/spherical/siscone.h
/usr/share/doc/libsiscone-spherical-dev/changelog.Debian.gz
/usr/lib/x86_64-linux-gnu/libsiscone_spherical.so