Night Light of Heemskerk (North Holland) from space (Netherlands) Src. Average luminocity for 10x10km area is 52.131% and for 50x50km: 27.3992%.
Square area 10x10 km:
 15.87%
 15.87% 15.08%
 15.08% 2.65%
 2.65% 5.42%
 5.42% 1.19%
 1.19% 1.72%
 1.72% 2.78%
 2.78% 6.88%
 6.88% 32.14%
 32.14% 14.42%
 14.42% 1.85%
 1.85%Square area 50x50 km:
 8.32%
 8.32% 6.75%
 6.75% 2.08%
 2.08% 1.97%
 1.97% 2.46%
 2.46% 2.44%
 2.44% 2.65%
 2.65% 3.55%
 3.55% 6.94%
 6.94% 11.21%
 11.21% 51.64%
 51.64%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
52° 56' 12.9" North, 3° 58' 6.7" East
52° 30' 39.9" North, 4° 40' 17.9" East
52° 4' 51.9" North, 5° 22' 29.2" East
Some cities around Heemskerk sort by population:
• Zaanstad
		11.6 km =7.2 mi,  123°
123°
• Velsen-Zuid
		5.9 km =3.7 mi,  194°
194°
• Beverwijk
		3.2 km =2 mi,  197°
197°
• Castricum
		4.1 km =2.5 mi,  357°
357°
• Heiloo
		10.2 km =6.3 mi,  6°
6°
• Uitgeest
		3.3 km =2.1 mi,  52°
52°
• Zaandijk
		10 km =6.2 mi,  113°
113°
• Limmen
		6.6 km =4.1 mi,  13°
13°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016