Night Light of Gerolstein (Rheinland-Pfalz) from space (Germany) Src. Average luminocity for 10x10km area is 3.2433% and for 50x50km: 0.6828%.
Square area 10x10 km:
 0.13%
 0.4%
 0%
 0.53%
 1.07%
 0.67%
 0.8%
 0.94%
 0%
 0.53%
 94.92%Square area 50x50 km:
 0.02%
 0.09%
 0.07%
 0.04%
 0.12%
 0.19%
 0.12%
 0.14%
 0.19%
 0.21%
 98.82%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
50° 40' 12" North, 5° 57' 24.2" East
50° 13' 20.1" North, 6° 39' 35.4" East
49° 46' 12.9" North, 7° 21' 46.7" East
Some cities around Gerolstein sort by population:
• Wittlich
		31.1 km =19.3 mi, 
147°
• Bitburg
		29.8 km =18.5 mi, 
198°
• Blankenheim
		23.5 km =14.6 mi, 
358°
• Hellenthal
		33.2 km =20.6 mi, 
331°
• Daun
		12.4 km =7.7 mi, 
103°
• Nettersheim
		30.3 km =18.8 mi, 
355°
• PrĂ¼m
		17.1 km =10.6 mi, 
264°
• Bullange, BE
		35.2 km =21.9 mi, 
305°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016