Night Light of Biaokou (Tianjin) from space (China) Src. Average luminocity for 10x10km area is 2.9133% and for 50x50km: 27.0826%.
Square area 10x10 km:
 0%
 0% 0%
 0% 0%
 0% 0%
 0% 1.36%
 1.36% 0%
 0% 0.51%
 0.51% 0.17%
 0.17% 0.68%
 0.68% 1.02%
 1.02% 96.26%
 96.26%Square area 50x50 km:
 4.66%
 4.66% 4.73%
 4.73% 3.67%
 3.67% 3.58%
 3.58% 4.49%
 4.49% 4.43%
 4.43% 4.51%
 4.51% 4.39%
 4.39% 4.58%
 4.58% 8.57%
 8.57% 52.38%
 52.38%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
39° 52' 1.4" North, 116° 51' 2.4" East
39° 19' 31" North, 117° 33' 13.6" East
38° 46' 45.3" North, 118° 15' 24.9" East
Some cities around Biaokou sort by population:
• Chitu
		18.8 km =11.7 mi,  223°
223°
• Beihuaidian
		7.5 km =4.7 mi,  173°
173°
• Zaojiacheng
		11.5 km =7.1 mi,  242°
242°
• Dongditou
		16.9 km =10.5 mi,  247°
247°
• Xitangtuo
		5.6 km =3.5 mi,  266°
266°
• Xiditou
		19.4 km =12.1 mi,  245°
245°
• Liukuaizhuang
		20.4 km =12.7 mi,  244°
244°
• Dawangtai
		8.1 km =5 mi,  226°
226°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016