Night Light of Mentougou (Beijing) from space (China) Src. Average luminocity for 10x10km area is 68.4388% and for 50x50km: 48.9699%.
Square area 10x10 km:
 15.99%
 15.99% 17.35%
 17.35% 14.46%
 14.46% 8.5%
 8.5% 7.99%
 7.99% 4.25%
 4.25% 7.14%
 7.14% 8.84%
 8.84% 11.05%
 11.05% 4.42%
 4.42% 0%
 0%Square area 50x50 km:
 18.31%
 18.31% 10.64%
 10.64% 6.99%
 6.99% 7.37%
 7.37% 5.8%
 5.8% 3.32%
 3.32% 1.84%
 1.84% 2.6%
 2.6% 3.2%
 3.2% 4.17%
 4.17% 35.77%
 35.77%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 28' 30.6" North, 115° 23' 23.8" East
39° 56' 17.5" North, 116° 5' 35.1" East
39° 23' 49.1" North, 116° 47' 46.3" East
Some cities around Mentougou sort by population:
• Beijing
		26.2 km =16.3 mi,  97°
97°
• Langfang
		70.1 km =43.6 mi,  132°
132°
• Tongzhou
		48.6 km =30.2 mi,  94°
94°
• Shunyi
		51.5 km =32 mi,  66°
66°
• Daxing
		29.7 km =18.5 mi,  137°
137°
• Fangshan
		29.1 km =18.1 mi,  196°
196°
• Changping
		33.2 km =20.6 mi,  21°
21°
• Liangxiang
		22.7 km =14.1 mi,  171°
171°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016