Night Light of Tongchuanshi (Shaanxi) from space (China) Src. Average luminocity for 10x10km area is 21.6189% and for 50x50km: 4.6539%.
Square area 10x10 km:
 0.52%
 2.1%
 9.09%
 2.62%
 1.22%
 1.92%
 2.27%
 3.15%
 0.87%
 16.43%
 59.79%Square area 50x50 km:
 0.25%
 0.66%
 0.88%
 0.65%
 0.55%
 0.45%
 0.74%
 0.94%
 1.27%
 3.09%
 90.52%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
35° 38' 53.3" North, 108° 22' 54.6" East
35° 4' 29.1" North, 109° 5' 5.8" East
34° 29' 50.2" North, 109° 47' 17.1" East
Some cities around Tongchuanshi sort by population:
• Xi’an
		91.9 km =57.1 mi, 
188°
• Xianyang
		89.1 km =55.4 mi, 
203°
• Huayin
		106 km =65.9 mi, 
122°
• Weinan
		74.4 km =46.2 mi, 
148°
• Lintong
		78.3 km =48.7 mi, 
171°
• Yanliang
		48 km =29.8 mi, 
164°
• Yuxia
		120.1 km =74.6 mi, 
200°
• Hancheng
		129.3 km =80.3 mi, 
70°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016