Night Light of Barreiro (District of Setúbal) from space (Portugal) Src. Average luminocity for 10x10km area is 68.3734% and for 50x50km: 45.9132%.
Square area 10x10 km:
 20.62%
 20.62% 18.51%
 18.51% 4.55%
 4.55% 5.68%
 5.68% 8.77%
 8.77% 4.87%
 4.87% 11.2%
 11.2% 19.97%
 19.97% 5.84%
 5.84% 0%
 0% 0%
 0%Square area 50x50 km:
 14.45%
 14.45% 11.52%
 11.52% 4.15%
 4.15% 4.99%
 4.99% 5.55%
 5.55% 4.37%
 4.37% 3.47%
 3.47% 5.02%
 5.02% 8.7%
 8.7% 8.9%
 8.9% 28.88%
 28.88%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
39° 12' 36.2" North, 9° 46' 31.9" West
38° 39' 47.3" North, 9° 4' 20.6" West
38° 6' 43.3" North, 8° 22' 9.4" West
Some cities around Barreiro sort by population:
• Amora
		5.3 km =3.3 mi,  225°
225°
• Arrentela
		4.9 km =3 mi,  210°
210°
• Lavradio
		1.9 km =1.2 mi,  72°
72°
• Laranjeira
		7.1 km =4.4 mi,  263°
263°
• Alhos Vedros
		4.3 km =2.7 mi,  102°
102°
• Aldeia de Paio Pires
		5.3 km =3.3 mi,  190°
190°
• Santo António da Charneca
		5.5 km =3.4 mi,  138°
138°
• Cacilhas
		7.2 km =4.5 mi,  291°
291°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016