Night Light of Ribeirão (Braga) from space (Portugal) Src. Average luminocity for 10x10km area is 74.5255% and for 50x50km: 59.644%.
Square area 10x10 km:
 14.46%
 14.46% 23.64%
 23.64% 8.16%
 8.16% 7.48%
 7.48% 16.67%
 16.67% 13.61%
 13.61% 11.39%
 11.39% 4.59%
 4.59% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 12.88%
 12.88% 13.05%
 13.05% 7.92%
 7.92% 9.93%
 9.93% 12.02%
 12.02% 9.13%
 9.13% 7.98%
 7.98% 5.89%
 5.89% 4.98%
 4.98% 3.33%
 3.33% 12.9%
 12.9%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 53' 11.1" North, 9° 16' 15.1" West
41° 21' 38.9" North, 8° 34' 3.9" West
40° 49' 51.3" North, 7° 51' 52.6" West
Some cities around Ribeirão sort by population:
• Bougado
		2.7 km =1.7 mi,  150°
150°
• Trofa
		2.7 km =1.7 mi,  165°
165°
• Santo Tirso
		7.8 km =4.8 mi,  105°
105°
• Calendário
		5.7 km =3.5 mi,  33°
33°
• Vila Nova de Famalicão
		6.6 km =4.1 mi,  37°
37°
• São Romão do Coronado
		8.4 km =5.2 mi,  177°
177°
• Ferreiros
		1.9 km =1.2 mi,  129°
129°
• São Miguel do Couto
		9.4 km =5.8 mi,  110°
110°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016