Night Light of Foz do Sousa (Porto) from space (Portugal) Src. Average luminocity for 10x10km area is 72.3474% and for 50x50km: 52.1609%.
Square area 10x10 km:
 16.88%
 16.88% 16.4%
 16.4% 9.58%
 9.58% 14.94%
 14.94% 12.99%
 12.99% 8.44%
 8.44% 5.84%
 5.84% 10.55%
 10.55% 4.38%
 4.38% 0%
 0% 0%
 0%Square area 50x50 km:
 14.02%
 14.02% 10.7%
 10.7% 5.93%
 5.93% 8.28%
 8.28% 8.71%
 8.71% 6.12%
 6.12% 5.47%
 5.47% 5.41%
 5.41% 7.25%
 7.25% 7.76%
 7.76% 20.36%
 20.36%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 37' 27.9" North, 9° 12' 17.9" West
41° 5' 48" North, 8° 30' 6.6" West
40° 33' 52.8" North, 7° 47' 55.4" West
Some cities around Foz do Sousa sort by population:
• Gondomar
		5.9 km =3.7 mi,  334°
334°
• Vilar de Andorinho
		7.1 km =4.4 mi,  278°
278°
• São Pedro da Cova
		5.2 km =3.2 mi,  1°
1°
• Valbom
		6.2 km =3.9 mi,  305°
305°
• Avintes
		4.3 km =2.7 mi,  285°
285°
• Jovim
		2.1 km =1.3 mi,  317°
317°
• Sandim
		6.9 km =4.3 mi,  183°
183°
• Olival
		6.3 km =3.9 mi,  214°
214°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016