Night Light of Treorchy (Wales) from space (United Kingdom) Src. Average luminocity for 10x10km area is 5.7325% and for 50x50km: 15.6225%.
Square area 10x10 km:
 0%
 0%
 0.56%
 0.28%
 1.82%
 1.82%
 1.12%
 1.4%
 1.68%
 0.84%
 90.48%Square area 50x50 km:
 2.14%
 2.77%
 1.32%
 1.87%
 1.75%
 1.72%
 1.99%
 2.63%
 4.71%
 14.32%
 64.78%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
52° 5' 37.1" North, 4° 12' 32.4" West
51° 39' 34.5" North, 3° 30' 21.1" West
51° 13' 16.7" North, 2° 48' 9.9" West
Some cities around Treorchy sort by population:
• Tonypandy
		5.4 km =3.4 mi, 
140°
• Rhondda
		3.9 km =2.4 mi, 
91°
• Aberdare
		7.2 km =4.5 mi, 
32°
• Mountain Ash
		9.1 km =5.7 mi, 
72°
• Tonyrefail
		9.9 km =6.2 mi, 
148°
• Ferndale
		4 km =2.5 mi, 
88°
• Hirwaun
		8.9 km =5.5 mi, 
358°
• Pentre
		1.2 km =0.7 mi, 
120°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016