This is the GD::Graph3d extensions module. It provides 3D graphs for the GD::Graph module by Martien Verbruggen, which in turn generates graph using Lincoln Stein's GD.pm. You use these modules just as you would any of the GD::Graph modules, except that they generate 3d-looking graphs.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.