Night Light of Zaojiacheng (Tianjin) from space (China) Src. Average luminocity for 10x10km area is 23.3759% and for 50x50km: 39.4572%.
Square area 10x10 km:
 0.17%
 0.17% 0.51%
 0.51% 0.68%
 0.68% 2.38%
 2.38% 2.38%
 2.38% 7.99%
 7.99% 7.48%
 7.48% 11.73%
 11.73% 9.86%
 9.86% 19.56%
 19.56% 37.24%
 37.24%Square area 50x50 km:
 13.32%
 13.32% 7.15%
 7.15% 5.25%
 5.25% 5.47%
 5.47% 4.24%
 4.24% 3.32%
 3.32% 4%
 4% 3.81%
 3.81% 4.36%
 4.36% 7.72%
 7.72% 41.38%
 41.38%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
39° 49' 9.2" North, 116° 43' 57.4" East
39° 16' 37.4" North, 117° 26' 8.7" East
38° 43' 50.4" North, 118° 8' 19.9" East
Some cities around Zaojiacheng sort by population:
• Chitu
		8.7 km =5.4 mi,  199°
199°
• Beihuaidian
		11.2 km =7 mi,  100°
100°
• Huantuo
		11.2 km =7 mi,  239°
239°
• Dongditou
		5.6 km =3.5 mi,  257°
257°
• Xitangtuo
		6.8 km =4.2 mi,  41°
41°
• Xiditou
		8 km =5 mi,  251°
251°
• Liukuaizhuang
		8.9 km =5.5 mi,  248°
248°
• Dawangtai
		4.2 km =2.6 mi,  93°
93°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016