мне кажетс историкам будет интерестно
https://chronas.org/
плюс есть возможность поучавствтвать
"Chronas is a history map application with over 50 million data points which every registered user can curate and contribute to (just like Wikipedia).
Before you dive in, make sure to watch the short Tutorial Video in the How To section.
Join our community of 6339 members to add and edit data, earn points, ask questions about history articles and access our Forums to suggest new features and report bugs.
Visit the About section to read more about the Chronas project and send the developers your inquiries, comments or questions through the Contact form.
We believe in the potential of this project to become a popular history tool alongside Wikipedia. If you share our enthusiasm and want to see the project succeed, please consider becoming a sustainer. For more information on support and the future of Chronas, visit the New Features section."
а это наш проект про границы государства
https://nplus1.ru/news/2019/01/31/runivers