Night Light of Tianshui (Gansu) from space (China) Src. Average luminocity for 10x10km area is 30.6101% and for 50x50km: 4.4485%.
Square area 10x10 km:
 7.69%
 9.09%
 1.4%
 0.35%
 0.35%
 1.92%
 1.4%
 3.85%
 4.9%
 52.1%
 16.96%Square area 50x50 km:
 0.59%
 0.76%
 0.41%
 0.66%
 0.46%
 0.36%
 0.33%
 0.41%
 0.6%
 6.16%
 89.26%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
35° 9' 23.1" North, 105° 2' 21.3" East
34° 34' 46.3" North, 105° 44' 32.6" East
33° 59' 55" North, 106° 26' 43.8" East
Some cities around Tianshui sort by population:
• Lanzhou
		238.3 km =148.1 mi, 
313°
• Guangyuan
		237.8 km =147.8 mi, 
178°
• Linxia Chengguanzhen
		257.1 km =159.8 mi, 
296°
• Hanzhong
		204.8 km =127.3 mi, 
144°
• Pingliang
		137 km =85.1 mi, 
38°
• Guozhen
		150.1 km =93.3 mi, 
99°
• Beidao
		13.9 km =8.6 mi, 
95°
• Mawu
		77.7 km =48.3 mi, 
257°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016