This is a file from the Wikimedia Commons and may be used by other projects. Information from its description page there is shown below. Commons is a freely licensed media file repository.
Summary
DescriptionCampSite.png
English: Map symbol for numbered campsites.
Source
Own work based on:Image:CampSite.svg (by TVerBeek) based on File:Camping.svg (PD-file by Áki G. Karlsson)