uncharted

adj

Etymology: From un- + charted. Piecewise doublet of uncarded.

1. Not surveyed or mapped.

   “Far out in the uncharted backwaters of the unfashionable end of the Western Spiral arm of the Galaxy lies a small unregarded yellow sun.”

   “John Wesley Powell ... the one-armed Civil War veteran led nine men in four wooden dories down the untamed and uncharted Colorado River and into the equally untamed and uncharted Grand Canyon.”