Black & White Aerial

source: http://freegeographytools.com/2007/goofing-around-with-pan-sharpening

Black & White Aerial maps are a subset of aerial photography. While colored aerial maps show greater detail of a particular area, black and white aerials are able to capture a much larger area. Colored aerials, in one study, were shown to capture 68 miles while a traditional black and white could cover around 129 miles. On top of having a wider captured span, black and white aerials can be combined with colored topography to show patterns and locations of different subject matters within the range of the aerial.