Night Light of Viamão (Rio Grande do Sul) from space (Brazil) Src. Average luminocity for 10x10km area is 49.4924% and for 50x50km: 34.8729%.
Square area 10x10 km:
 4.17%
 4.17%
 12.69%
 8.71%
 10.23%
 9.47%
 9.28%
 7.77%
 12.12%
 17.23%
 4.17%Square area 50x50 km:
 10.04%
 6.2%
 4.94%
 4.62%
 4.83%
 4.4%
 3.45%
 3.71%
 5.17%
 6.49%
 46.15%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
29° 28' 15" South, 51° 43' 35.3" West
30° 4' 52" South, 51° 1' 24" West
30° 41' 15.6" South, 50° 19' 12.8" West
Some cities around Viamão sort by population:
• Porto Alegre
		20.6 km =12.8 mi, 
285°
• Canoas
		23.8 km =14.8 mi, 
319°
• Gravataí
		15.7 km =9.8 mi, 
10°
• São Leopoldo
		37.6 km =23.4 mi, 
341°
• Sapucaia
		30.1 km =18.7 mi, 
336°
• Cachoeirinha
		16 km =9.9 mi, 
334°
• Guaíba
		29.2 km =18.1 mi, 
262°
• Esteio
		28.7 km =17.8 mi, 
328°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016