Night Light of Sierra Grande (Rio Negro) from space (Argentina) Src. Average luminocity for 10x10km area is 5.8425% and for 50x50km: 0.236%.
Square area 10x10 km:
 0.65%
 2.6%
 1.3%
 0.65%
 0%
 0%
 0%
 0%
 0%
 0%
 94.81%Square area 50x50 km:
 0.03%
 0.1%
 0.05%
 0.03%
 0%
 0%
 0%
 0%
 0%
 0%
 99.79%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
41° 4' 41.3" South, 66° 3' 31.9" West
41° 36' 21.7" South, 65° 21' 20.7" West
42° 7' 46.7" South, 64° 39' 9.4" West
Some cities around Sierra Grande sort by population:
• Trelew
		182.7 km =113.5 mi, 
178°
• Puerto Madryn
		131.9 km =82 mi, 
168°
• Viedma
		216.1 km =134.3 mi, 
65°
• Rawson
		189.5 km =117.7 mi, 
173°
• San Antonio Oeste
		103 km =64 mi, 
19°
• Lamarque
		244.5 km =151.9 mi, 
353°
• Gaimán
		187.5 km =116.5 mi, 
183°
• General Conesa
		183.3 km =113.9 mi, 
24°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016