Night Light of Fort Madison (Iowa) from space (United States) Src. Average luminocity for 10x10km area is 18.5877% and for 50x50km: 5.2985%.
Square area 10x10 km:
 1.62%
 2.92%
 3.41%
 3.57%
 1.46%
 1.3%
 1.14%
 3.25%
 1.46%
 17.86%
 62.01%Square area 50x50 km:
 0.59%
 0.69%
 0.88%
 0.63%
 0.68%
 0.53%
 0.53%
 0.79%
 1.13%
 4.17%
 89.36%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 9' 40.5" North, 92° 1' 5.8" West
40° 37' 47.1" North, 91° 18' 54.5" West
40° 5' 38.4" North, 90° 36' 43.3" West
Some cities around Fort Madison sort by population:
• Quincy
		77.6 km =48.2 mi, 
185°
• Burlington
		26.1 km =16.2 mi, 
40°
• Macomb
		57.6 km =35.8 mi, 
109°
• Keokuk
		26.5 km =16.5 mi, 
192°
• Fairfield
		68.9 km =42.8 mi, 
307°
• Monmouth
		64.4 km =40 mi, 
60°
• Mount Pleasant
		42.4 km =26.3 mi, 
331°
• Washington
		80.9 km =50.3 mi, 
336°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016