Pinhead map icons - Wayside Mapping - CC0 1.0 Universal (public domain)
https://pinhead.ink
https://creativecommons.org/publicdomain/zero/1.0/

PitStopper's conversion of them (the halo, the 128 px PNGs, the SVG wrappers)
is also released under CC0 1.0. Use it for anything, no credit needed; credit
to Pinhead and PitStopper is welcome all the same.
