Night Light of Guifões (Porto) from space (Portugal) Src. Average luminocity for 10x10km area is 90.7679% and for 50x50km: 44.7126%.
Square area 10x10 km:
 66.72%
 66.72% 18.51%
 18.51% 1.62%
 1.62% 0.65%
 0.65% 0.65%
 0.65% 0.32%
 0.32% 0.65%
 0.65% 5.52%
 5.52% 4.71%
 4.71% 0.65%
 0.65% 0%
 0%Square area 50x50 km:
 14.13%
 14.13% 10.49%
 10.49% 5.01%
 5.01% 6.04%
 6.04% 6.98%
 6.98% 4.55%
 4.55% 3.75%
 3.75% 3.71%
 3.71% 3.91%
 3.91% 4.61%
 4.61% 36.82%
 36.82%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 43' 27.8" North, 9° 22' 19.6" West
41° 11' 50.9" North, 8° 40' 8.4" West
40° 39' 58.6" North, 7° 57' 57.1" West
Some cities around Guifões sort by population:
• Senhora da Hora
		1.9 km =1.2 mi,  130°
130°
• Matosinhos
		2.4 km =1.5 mi,  224°
224°
• São Mamede de Infesta
		4.9 km =3 mi,  97°
97°
• Leça da Palmeira
		2.7 km =1.7 mi,  254°
254°
• Leça do Bailio
		3.3 km =2.1 mi,  60°
60°
• Moreira
		5.8 km =3.6 mi,  17°
17°
• Foz do Douro
		5.2 km =3.2 mi,  182°
182°
• Santa Cruz do Bispo
		2 km =1.2 mi,  347°
347°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016