prep2-essay14-47

Jodie_310

Though these maps incorporate some information gleaned directly from Native Americans, rarely has Native American cartography contributed to this official record, which has been compiled, surveyed, and authenticated by non-Native Americans. 

请问这句话该怎么翻译？

另外，

第二段的Thus our current cartographic record ...的map是指第一段中的Maps made by non-Native Americans？还是当代由native american制作的map呢？