Night Light of De Aar (Northern Cape) from space (South Africa) Src. Average luminocity for 10x10km area is 19.1923% and for 50x50km: 0.8661%.
Square area 10x10 km:
 2.97%
 4.72%
 2.45%
 3.15%
 0.52%
 0.87%
 1.05%
 2.27%
 1.57%
 11.19%
 69.23%Square area 50x50 km:
 0.12%
 0.2%
 0.1%
 0.13%
 0.02%
 0.04%
 0.04%
 0.1%
 0.08%
 0.47%
 98.69%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
30° 2' 34.4" South, 23° 18' 33" East
30° 38' 58.8" South, 24° 0' 44.3" East
31° 15' 9.6" South, 24° 42' 55.5" East
Some cities around De Aar sort by population:
• Kimberley
		225.2 km =139.9 mi, 
18°
• Graaff-Reinet
		184.8 km =114.8 mi, 
164°
• Middelburg
		133.2 km =82.8 mi, 
134°
• Burgersdorp
		224.5 km =139.5 mi, 
99°
• Colesberg
		104 km =64.6 mi, 
94°
• Prieska
		163.8 km =101.8 mi, 
311°
• Ritchie
		188 km =116.8 mi, 
17°
• Carnarvon
		182.9 km =113.6 mi, 
258°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016