Night Light of Tongzhou (Beijing) from space (China) Src. Average luminocity for 10x10km area is 95.8469% and for 50x50km: 68.4979%.
Square area 10x10 km:
 57.31%
 57.31% 26.19%
 26.19% 8.33%
 8.33% 7.31%
 7.31% 0.85%
 0.85% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 22.07%
 22.07% 12.63%
 12.63% 10.51%
 10.51% 10.08%
 10.08% 8.93%
 8.93% 8.2%
 8.2% 7.03%
 7.03% 4.83%
 4.83% 6.62%
 6.62% 7.41%
 7.41% 1.69%
 1.69%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 26' 28.4" North, 115° 57' 31.4" East
39° 54' 14.2" North, 116° 39' 42.6" East
39° 21' 44.8" North, 117° 21' 53.9" East
Some cities around Tongzhou sort by population:
• Beijing
		22.6 km =14 mi,  271°
271°
• Langfang
		43.9 km =27.3 mi,  176°
176°
• Mentougou
		48.6 km =30.2 mi,  274°
274°
• Shunyi
		24.2 km =15 mi,  357°
357°
• Daxing
		33.9 km =21.1 mi,  237°
237°
• Changping
		50.3 km =31.3 mi,  313°
313°
• Liangxiang
		48.9 km =30.4 mi,  247°
247°
• Bangjun
		52.1 km =32.4 mi,  79°
79°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016