The phrase "kilometer area" refers to a specific measurement of distance. It indicates the space or region that extends for one kilometer, which is equal to 1,000 meters or roughly 0.6 miles. Full definition
In 2005, he and marine scientist Victor Springer recorded 1,736 overlapping marine species in a mere 10 - square kilometer area of the passage. (ecowatch.com)
Anticipating the arrival of B. dendrobatidis in El Copé, Panama, as a wave of infection advanced from the northwest of the country, co-author Karen Lips, a biologist at the University of Maryland in College Park, began leading field surveys in the 4 - kilometer area in 1998. (scientificamerican.com)
Recorded in extreme ultraviolet light, it covers a 230,000 - by - 77,000 kilometer area on the sun's surface and shows a one - million - degree solar plasma cooling down. (discovermagazine.com)