Watch 200 years of US border changes in 2 minutes https://www.osls.org/forums/posts.aspx?topic=1194815 Thu, 9 Jul 2026 05:17:21 GMT Fri, 29 Jan 2016 17:49:51 GMT Copyright © 2016 Oklahoma Society of Land Surveyors Watch 200 years of US border changes in 2 minutes https://www.osls.org/forums/posts.aspx?topic=1194815 https://www.osls.org/forums/posts.aspx?topic=1194815 http://www.businessinsider.com/animated-map-of-200-years-us-border-territory-changes-2016-1#ooid=15N2VkMDE6IeGeXy5OurctanKLkxPvms

 

Keeping surveyors busy

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