Terms starting with N

NADIR

That point on the ground vertically beneath the perspective center of the detector or camera lens.

NATURAL COLOR IMAGERY

A three-band image combining red, green and blue bands of data.

NAVIGABLE WATERS

Water usable, with or without improvements, as routes for commerce in the customary means of travel on water. 

NEAT LINE

Line separating the body of a map from the map margin. On a standard quadrangle map, the neatlines are the meridians and parallels delimiting the quadrangle. 

NGA - National Geospatial Intelligence Agency

NGA is a member of the U.S. Intelligence Community and a Department of Defense Combat Support Agency. The organization provides timely, relevant and accurate geospatial intelligence in support of national security objectives.