Night Light of Tangshan (Hebei) from space (China) Src. Average luminocity for 10x10km area is 95.9481% and for 50x50km: 25.725%.
Square area 10x10 km:
 64.29%
 64.29% 21.43%
 21.43% 4.22%
 4.22% 7.63%
 7.63% 2.11%
 2.11% 0.32%
 0.32% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 5.15%
 5.15% 3.48%
 3.48% 2.52%
 2.52% 2.83%
 2.83% 3.74%
 3.74% 5.05%
 5.05% 3.91%
 3.91% 5.24%
 5.24% 6.7%
 6.7% 11.8%
 11.8% 49.59%
 49.59%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 10' 21.8" North, 117° 28' 48.8" East
39° 37' 60" North, 118° 10' 60" East
39° 5' 23" North, 118° 53' 11.3" East
Some cities around Tangshan sort by population:
• Hangu
		54.5 km =33.9 mi,  218°
218°
• Linxi
		24.4 km =15.2 mi,  69°
69°
• Zhaogezhuang
		24.5 km =15.2 mi,  53°
53°
• Tangjiazhuang
		26 km =16.2 mi,  61°
61°
• Fengrun
		23 km =14.3 mi,  345°
345°
• Guye
		24.5 km =15.2 mi,  63°
63°
• Biaokou
		64 km =39.8 mi,  237°
237°
• Fengtai
		38.1 km =23.7 mi,  257°
257°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016