Night Light of Salem (Ohio) from space (United States) Src. Average luminocity for 10x10km area is 27.4847% and for 50x50km: 17.5543%.
Square area 10x10 km:
 2.55%
 5.1%
 2.55%
 3.4%
 3.57%
 5.27%
 3.91%
 2.72%
 5.95%
 32.48%
 32.48%Square area 50x50 km:
 2.03%
 2.88%
 2.38%
 2.56%
 2.99%
 3.21%
 1.86%
 2.16%
 4.3%
 8.68%
 66.93%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 25' 48.8" North, 81° 33' 35.6" West
40° 54' 3.2" North, 80° 51' 24.3" West
40° 22' 2.3" North, 80° 9' 13.1" West
Some cities around Salem sort by population:
• Youngstown
		28.1 km =17.5 mi, 
38°
• Boardman
		21.3 km =13.2 mi, 
49°
• Austintown
		23.6 km =14.7 mi, 
19°
• Alliance
		21 km =13 mi, 
274°
• Struthers
		26.9 km =16.7 mi, 
51°
• Campbell
		29.3 km =18.2 mi, 
47°
• Canfield
		16 km =9.9 mi, 
30°
• Columbiana
		13.8 km =8.6 mi, 
95°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016