Night Light of Charleston (Illinois) from space (United States) Src. Average luminocity for 10x10km area is 23.9253% and for 50x50km: 4.5971%.
Square area 10x10 km:
 2.6%
 4.87%
 3.73%
 2.44%
 0.81%
 4.06%
 4.22%
 1.14%
 2.92%
 25.16%
 48.05%Square area 50x50 km:
 0.4%
 0.6%
 0.69%
 0.6%
 0.47%
 0.78%
 0.66%
 0.52%
 0.69%
 3.56%
 91.03%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 2' 11.8" North, 88° 52' 45.4" West
39° 29' 46.1" North, 88° 10' 34.1" West
38° 57' 5.3" North, 87° 28' 22.9" West
Some cities around Charleston sort by population:
• Terre Haute
		65.5 km =40.7 mi, 
92°
• Mattoon
		16.9 km =10.5 mi, 
265°
• Effingham
		52.4 km =32.6 mi, 
217°
• Paris
		43.1 km =26.8 mi, 
72°
• Savoy
		62.4 km =38.8 mi, 
354°
• Robinson
		66.3 km =41.2 mi, 
145°
• Mount Zion
		67.2 km =41.8 mi, 
297°
• Monticello
		68.2 km =42.4 mi, 
330°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016