Night Light of Serzedo (Porto) from space (Portugal) Src. Average luminocity for 10x10km area is 86.8112% and for 50x50km: 42.3068%.
Square area 10x10 km:
 43.54%
 43.54% 32.48%
 32.48% 6.46%
 6.46% 0%
 0% 0.68%
 0.68% 1.36%
 1.36% 0.51%
 0.51% 8.84%
 8.84% 6.12%
 6.12% 0%
 0% 0%
 0%Square area 50x50 km:
 13.23%
 13.23% 9.23%
 9.23% 4.66%
 4.66% 5.81%
 5.81% 6.28%
 6.28% 4.13%
 4.13% 3.54%
 3.54% 4.05%
 4.05% 5.47%
 5.47% 6.8%
 6.8% 36.81%
 36.81%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 34' 45" North, 9° 19' 9" West
41° 3' 3.8" North, 8° 36' 57.8" West
40° 31' 7.2" North, 7° 54' 46.5" West
Some cities around Serzedo sort by population:
• Arcozelo
		1.8 km =1.1 mi,  312°
312°
• Canelas
		3.8 km =2.4 mi,  20°
20°
• Azenha
		2.9 km =1.8 mi,  345°
345°
• São Félix da Marinha
		1.8 km =1.1 mi,  197°
197°
• Grijó
		3.9 km =2.4 mi,  129°
129°
• Gulpilhares
		3.7 km =2.3 mi,  345°
345°
• Perozinho
		3 km =1.9 mi,  58°
58°
• Vila Nova da Telha
		3.1 km =1.9 mi,  317°
317°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016