Night Light of São João da Barra (Rio de Janeiro) from space (Brazil) Src. Average luminocity for 10x10km area is 23.2652% and for 50x50km: 8.6058%.
Square area 10x10 km:
 1.52%
 2.27%
 3.03%
 5.11%
 4.55%
 2.08%
 3.03%
 1.14%
 3.6%
 29.36%
 44.32%Square area 50x50 km:
 0.34%
 0.45%
 0.95%
 1.44%
 1.57%
 1.03%
 2%
 1.9%
 1.84%
 8.27%
 80.21%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
20° 59' 6.9" South, 41° 45' 15.3" West
21° 38' 25" South, 41° 3' 4" West
22° 17' 32.5" South, 40° 20' 52.8" West
Some cities around São João da Barra sort by population:
• Campos dos Goytacazes
		31.4 km =19.5 mi, 
246°
• Cachoeiro de Itapemirim
		88.2 km =54.8 mi, 
355°
• Bom Jesus do Itabapoana
		86.1 km =53.5 mi, 
310°
• São Fidélis
		71.9 km =44.7 mi, 
269°
• Marataizes
		70.4 km =43.7 mi, 
19°
• Itapemirim
		73.5 km =45.7 mi, 
17°
• Mimoso do Sul
		71.9 km =44.7 mi, 
332°
• Rio Novo do Sul
		87.3 km =54.2 mi, 
7°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016