Night Light of Barrosas (Porto) from space (Portugal) Src. Average luminocity for 10x10km area is 67.1497% and for 50x50km: 55.7396%.
Square area 10x10 km:
 2.55%
 2.55% 13.61%
 13.61% 12.93%
 12.93% 13.1%
 13.1% 18.37%
 18.37% 22.11%
 22.11% 11.05%
 11.05% 6.29%
 6.29% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 8.1%
 8.1% 10.66%
 10.66% 7.81%
 7.81% 9.7%
 9.7% 12.82%
 12.82% 10.68%
 10.68% 9.03%
 9.03% 7.24%
 7.24% 6.9%
 6.9% 6.03%
 6.03% 11.03%
 11.03%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 52' 51.5" North, 9° 0' 9.2" West
41° 21' 19.2" North, 8° 17' 57.9" West
40° 49' 31.5" North, 7° 35' 46.7" West
Some cities around Barrosas sort by population:
• Margaride
		8.4 km =5.2 mi,  82°
82°
• Caldas de Vizela
		3.1 km =1.9 mi,  345°
345°
• Selho
		8.1 km =5 mi,  331°
331°
• Serzedo
		8 km =5 mi,  46°
46°
• Freamunde
		8 km =5 mi,  201°
201°
• Negrelos
		8.5 km =5.3 mi,  265°
265°
• Moreira de Conegos
		4.8 km =3 mi,  316°
316°
• Urgeses
		8 km =5 mi,  0°
0°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016