Night Light of Alfter (North Rhine-Westphalia) from space (Germany) Src. Average luminocity for 10x10km area is 40.369% and for 50x50km: 23.136%.
Square area 10x10 km:
 8.29%
 8.29% 8.42%
 8.42% 3.48%
 3.48% 3.88%
 3.88% 3.07%
 3.07% 6.02%
 6.02% 8.02%
 8.02% 8.42%
 8.42% 10.43%
 10.43% 19.79%
 19.79% 20.19%
 20.19%Square area 50x50 km:
 4.32%
 4.32% 4.61%
 4.61% 2.09%
 2.09% 1.84%
 1.84% 3.13%
 3.13% 3.19%
 3.19% 3.26%
 3.26% 4.52%
 4.52% 6.68%
 6.68% 11.05%
 11.05% 55.33%
 55.33%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
51° 10' 34.5" North, 6° 18' 48.8" East
50° 43' 60" North, 7° 1' 0" East
50° 17' 10.2" North, 7° 43' 11.3" East
Some cities around Alfter sort by population:
• Bonn
		5.5 km =3.4 mi,  88°
88°
• Troisdorf
		12.6 km =7.8 mi,  48°
48°
• Bornheim
		3.8 km =2.4 mi,  331°
331°
• Niederkassel
		9.2 km =5.7 mi,  9°
9°
• Wesseling
		10.8 km =6.7 mi,  344°
344°
• Meckenheim
		12.2 km =7.6 mi,  175°
175°
• Wachtberg
		12.6 km =7.8 mi,  152°
152°
• Weilerswist
		12.2 km =7.6 mi,  280°
280°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016