Night Light of Oliveira do Douro (Porto) from space (Portugal) Src. Average luminocity for 10x10km area is 98.8734% and for 50x50km: 47.995%.
Square area 10x10 km:
 81.17%
 81.17% 14.45%
 14.45% 2.6%
 2.6% 1.79%
 1.79% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 13.99%
 13.99% 10.56%
 10.56% 5.23%
 5.23% 7.43%
 7.43% 7.62%
 7.62% 5.25%
 5.25% 4.65%
 4.65% 4.27%
 4.27% 5.29%
 5.29% 6.59%
 6.59% 29.12%
 29.12%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 39' 7.8" North, 9° 17' 15.9" West
41° 7' 28.8" North, 8° 35' 4.7" West
40° 35' 34.3" North, 7° 52' 53.4" West
Some cities around Oliveira do Douro sort by population:
• Porto
		3.5 km =2.2 mi,  321°
321°
• Vila Nova de Gaia
		2.3 km =1.4 mi,  268°
268°
• Gondomar
		4.9 km =3 mi,  63°
63°
• Vilar de Andorinho
		2.1 km =1.3 mi,  183°
183°
• Vilar do ParaĆso
		4.9 km =3 mi,  218°
218°
• Valbom
		2 km =1.2 mi,  75°
75°
• Canelas
		4.8 km =3 mi,  195°
195°
• Avintes
		3.4 km =2.1 mi,  124°
124°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016