Night Light of Beicang (Tianjin) from space (China) Src. Average luminocity for 10x10km area is 87.3776% and for 50x50km: 55.4808%.
Square area 10x10 km:
 25.51%
 25.51% 23.3%
 23.3% 23.64%
 23.64% 14.63%
 14.63% 9.35%
 9.35% 3.57%
 3.57% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 16.62%
 16.62% 10.76%
 10.76% 9.23%
 9.23% 7.62%
 7.62% 7.16%
 7.16% 4.95%
 4.95% 4.87%
 4.87% 5.31%
 5.31% 7.32%
 7.32% 8.93%
 8.93% 17.24%
 17.24%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
39° 46' 41.5" North, 116° 25' 10.2" East
39° 14' 8.5" North, 117° 7' 21.4" East
38° 41' 20.3" North, 117° 49' 32.7" East
Some cities around Beicang sort by population:
• Tianjin
		11.4 km =7.1 mi,  155°
155°
• Yangliuqing
		15.2 km =9.4 mi,  224°
224°
• Yangcun
		15.2 km =9.4 mi,  339°
339°
• Hanjiashu
		6.9 km =4.3 mi,  218°
218°
• Qingguang
		8.7 km =5.4 mi,  241°
241°
• Huantuo
		17.4 km =10.8 mi,  93°
93°
• Dabizhuang
		12.4 km =7.7 mi,  112°
112°
• Xiaodian
		9.3 km =5.8 mi,  77°
77°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016