Night Light of Perozinho (Porto) from space (Portugal) Src. Average luminocity for 10x10km area is 96.224% and for 50x50km: 45.5068%.
Square area 10x10 km:
 51.79%
 51.79% 31.66%
 31.66% 11.2%
 11.2% 5.36%
 5.36% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 13.79%
 13.79% 9.91%
 9.91% 5.05%
 5.05% 6.78%
 6.78% 7.05%
 7.05% 4.44%
 4.44% 3.81%
 3.81% 4.1%
 4.1% 5.68%
 5.68% 7%
 7% 32.4%
 32.4%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 35' 35.2" North, 9° 17' 18.3" West
41° 3' 54.5" North, 8° 35' 7.1" West
40° 31' 58.3" North, 7° 52' 55.8" West
Some cities around Perozinho sort by population:
• Vilar do Paraíso
		4.1 km =2.5 mi,  312°
312°
• Arcozelo
		3.9 km =2.4 mi,  264°
264°
• Canelas
		2.4 km =1.5 mi,  328°
328°
• Azenha
		3.5 km =2.2 mi,  290°
290°
• Grijó
		4.1 km =2.5 mi,  173°
173°
• Gulpilhares
		4 km =2.5 mi,  299°
299°
• Serzedo
		3 km =1.9 mi,  238°
238°
• Olival
		3.8 km =2.4 mi,  115°
115°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016