Night Light of Tangjiazhuang (Hebei) from space (China) Src. Average luminocity for 10x10km area is 51.7825% and for 50x50km: 22.6673%.
Square area 10x10 km:
 7.14%
 7.14% 6.17%
 6.17% 10.71%
 10.71% 6.66%
 6.66% 8.28%
 8.28% 12.99%
 12.99% 7.14%
 7.14% 9.74%
 9.74% 13.64%
 13.64% 16.23%
 16.23% 1.3%
 1.3%Square area 50x50 km:
 3.34%
 3.34% 2.62%
 2.62% 2.16%
 2.16% 2.45%
 2.45% 3.3%
 3.3% 4.82%
 4.82% 3.34%
 3.34% 5.71%
 5.71% 6.99%
 6.99% 15.09%
 15.09% 50.17%
 50.17%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
40° 16' 54.4" North, 117° 44' 52.3" East
39° 44' 35.7" North, 118° 27' 3.6" East
39° 12' 1.8" North, 119° 9' 14.8" East
Some cities around Tangjiazhuang sort by population:
• Tangshan
		26 km =16.2 mi,  241°
241°
• Linxi
		3.5 km =2.2 mi,  182°
182°
• Zhaogezhuang
		4.1 km =2.5 mi,  306°
306°
• Fengrun
		30.3 km =18.8 mi,  289°
289°
• Changli
		60 km =37.3 mi,  94°
94°
• Songling
		63.1 km =39.2 mi,  345°
345°
• Guye
		1.7 km =1.1 mi,  211°
211°
• Fengtai
		63.5 km =39.5 mi,  251°
251°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016