Night Light of Beihuaidian (Tianjin) from space (China) Src. Average luminocity for 10x10km area is 11.25% and for 50x50km: 37.7867%.
Square area 10x10 km:
 0%
 0% 0%
 0% 0.51%
 0.51% 1.7%
 1.7% 1.87%
 1.87% 1.36%
 1.36% 2.72%
 2.72% 3.4%
 3.4% 4.08%
 4.08% 4.93%
 4.93% 79.42%
 79.42%Square area 50x50 km:
 8.67%
 8.67% 7.64%
 7.64% 5.22%
 5.22% 6.05%
 6.05% 5.34%
 5.34% 4.82%
 4.82% 4.51%
 4.51% 4.39%
 4.39% 5.12%
 5.12% 7.88%
 7.88% 40.35%
 40.35%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
39° 48' 3.1" North, 116° 51' 38.4" East
39° 15' 30.7" North, 117° 33' 49.6" East
38° 42' 43.2" North, 118° 16' 0.9" East
Some cities around Beihuaidian sort by population:
• Chitu
		15.2 km =9.4 mi,  246°
246°
• Biaokou
		7.5 km =4.7 mi,  353°
353°
• Zaojiacheng
		11.2 km =7 mi,  280°
280°
• Ningchegu
		14 km =8.7 mi,  142°
142°
• Dongditou
		16.5 km =10.3 mi,  273°
273°
• Xitangtuo
		9.6 km =6 mi,  317°
317°
• Xiditou
		18.6 km =11.6 mi,  268°
268°
• Dawangtai
		7 km =4.3 mi,  285°
285°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016