Night Light of Rock Island (Illinois) from space (United States) Src. Average luminocity for 10x10km area is 85.9218% and for 50x50km: 18.5078%.
Square area 10x10 km:
 30.61%
 27.21%
 13.44%
 12.41%
 4.93%
 4.42%
 2.21%
 3.57%
 1.19%
 0%
 0%Square area 50x50 km:
 3.36%
 3.43%
 2.87%
 2.45%
 2.24%
 2.32%
 2.29%
 2.73%
 4.53%
 6.66%
 67.13%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
42° 2' 1.9" North, 91° 16' 54.8" West
41° 30' 34.1" North, 90° 34' 43.5" West
40° 58' 50.9" North, 89° 52' 32.3" West
Some cities around Rock Island sort by population:
• Davenport
		1.6 km =1 mi, 
3°
• Moline
		5.3 km =3.3 mi, 
93°
• Bettendorf
		5.5 km =3.4 mi, 
72°
• East Moline
		11.2 km =7 mi, 
94°
• Silvis
		13.6 km =8.5 mi, 
88°
• Eldridge
		16.5 km =10.3 mi, 
358°
• Colona
		19 km =11.8 mi, 
98°
• Milan
		6.3 km =3.9 mi, 
174°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016