Night Light of Appingedam (Groningen) from space (Netherlands) Src. Average luminocity for 10x10km area is 10.7083% and for 50x50km: 7.1444%.
Square area 10x10 km:
 0.51%
 1.39%
 0.25%
 2.65%
 1.14%
 3.03%
 1.77%
 0.13%
 2.53%
 6.69%
 79.92%Square area 50x50 km:
 1.38%
 1.46%
 0.76%
 0.7%
 0.49%
 0.61%
 0.55%
 0.59%
 1.34%
 5.62%
 86.49%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
53° 44' 22.6" North, 6° 9' 18.8" East
53° 19' 18" North, 6° 51' 30" East
52° 53' 58.6" North, 7° 33' 41.3" East
Some cities around Appingedam sort by population:
• Groningen
		22.5 km =14 mi, 
239°
• Delfzijl
		4.1 km =2.5 mi, 
76°
• Hoogezand
		18.9 km =11.7 mi, 
199°
• Korrewegwijk
		21.7 km =13.5 mi, 
242°
• Oosterpark
		21.2 km =13.2 mi, 
239°
• Sappemeer
		18.1 km =11.2 mi, 
194°
• Bedum
		17.1 km =10.6 mi, 
262°
• Selwerd
		22.4 km =13.9 mi, 
244°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016