Night Light of Groenswaard (South Holland) from space (Netherlands) Src. Average luminocity for 10x10km area is 80.3131% and for 50x50km: 50.0777%.
Square area 10x10 km:
 30.43%
 30.43% 24.12%
 24.12% 5.43%
 5.43% 5.68%
 5.68% 10.23%
 10.23% 9.72%
 9.72% 8.71%
 8.71% 3.03%
 3.03% 2.65%
 2.65% 0%
 0% 0%
 0%Square area 50x50 km:
 18.12%
 18.12% 12.71%
 12.71% 3.22%
 3.22% 4.29%
 4.29% 5.43%
 5.43% 3.99%
 3.99% 4.41%
 4.41% 5.35%
 5.35% 7.97%
 7.97% 10.02%
 10.02% 24.49%
 24.49%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
52° 28' 54.6" North, 3° 56' 32.2" East
52° 3' 5.5" North, 4° 38' 43.5" East
51° 37' 1.4" North, 5° 20' 54.7" East
Some cities around Groenswaard sort by population:
• Gouda
		5.8 km =3.6 mi,  132°
132°
• Alphen aan den Rijn
		8.7 km =5.4 mi,  4°
4°
• Waddinxveen
		0.8 km =0.5 mi,  150°
150°
• Bodegraven
		7.9 km =4.9 mi,  64°
64°
• Benthuizen
		7.5 km =4.7 mi,  292°
292°
• Boskoop
		2.7 km =1.7 mi,  14°
14°
• Reeuwijk
		5.5 km =3.4 mi,  95°
95°
• Bloemendaal
		4.2 km =2.6 mi,  127°
127°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016