og 45 阅读中的一句话，帮看看

Maps made by non-Native Americans to depict Native American land tenure (land tenure:土地所有制), resources and population distributions appeared almost as early as Europeans’ first encounters with Native Americans and took many form: missionaries’ field sketches, explorers’ drawings, and surveyors’ maps, as well as maps rendered in connection with treaties involving land transfers.

红字部分总觉得有语法问题？怎么解释？

冷

意思大致是，“几乎早在欧洲人接触土著美洲(印第安人)时，地图就出现了并且有很多形式。

好像语法上没问题，这里的encounters好像是名词了。