Night Light of São Romão do Coronado (Porto) from space (Portugal) Src. Average luminocity for 10x10km area is 72.9935% and for 50x50km: 58.1221%.
Square area 10x10 km:
 17.53%
 17.53% 15.75%
 15.75% 9.9%
 9.9% 11.69%
 11.69% 15.58%
 15.58% 10.55%
 10.55% 10.06%
 10.06% 8.93%
 8.93% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 14.34%
 14.34% 12.31%
 12.31% 7.32%
 7.32% 9.32%
 9.32% 11.37%
 11.37% 8.17%
 8.17% 7.12%
 7.12% 5.54%
 5.54% 4.75%
 4.75% 4.42%
 4.42% 15.34%
 15.34%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 48' 41.9" North, 9° 15' 58.8" West
41° 17' 7.6" North, 8° 33' 47.5" West
40° 45' 17.8" North, 7° 51' 36.3" West
Some cities around São Romão do Coronado sort by population:
• Ermesinde
		7.7 km =4.8 mi,  173°
173°
• Maia
		7.3 km =4.5 mi,  220°
220°
• Bougado
		6.1 km =3.8 mi,  8°
8°
• Trofa
		5.8 km =3.6 mi,  2°
2°
• Alfena
		6.3 km =3.9 mi,  149°
149°
• Anta
		5.9 km =3.7 mi,  248°
248°
• Ferreiros
		7.3 km =4.5 mi,  8°
8°
• Gemunde
		7.1 km =4.4 mi,  253°
253°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016