Night Light of Cidreira (Rio Grande do Sul) from space (Brazil) Src. Average luminocity for 10x10km area is 18.3741% and for 50x50km: 4.6916%.
Square area 10x10 km:
 1.22%
 4.02%
 4.37%
 1.57%
 1.22%
 1.22%
 1.05%
 3.15%
 0.87%
 18.18%
 63.11%Square area 50x50 km:
 0.64%
 0.83%
 0.69%
 0.42%
 0.54%
 0.29%
 0.24%
 0.73%
 1.32%
 3.72%
 90.58%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
29° 34' 17.1" South, 50° 54' 31.3" West
30° 10' 52" South, 50° 12' 20" West
30° 47' 13.3" South, 49° 30' 8.8" West
Some cities around Cidreira sort by population:
• Viamão
		79.4 km =49.3 mi, 
278°
• Gravataí
		80.3 km =49.9 mi, 
289°
• Taquara
		80.9 km =50.3 mi, 
316°
• Capão da Canoa
		52 km =32.3 mi, 
21°
• Tramandaí
		22.9 km =14.2 mi, 
17°
• Osório
		33.3 km =20.7 mi, 
349°
• Rolante
		68.9 km =42.8 mi, 
328°
• Palmares do Sul
		30.4 km =18.9 mi, 
253°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016