Night Light of Yima (Henan) from space (China) Src. Average luminocity for 10x10km area is 34.1447% and for 50x50km: 5.4611%.
Square area 10x10 km:
 3.48%
 4.95%
 7.14%
 2.75%
 4.03%
 6.96%
 2.01%
 10.62%
 5.49%
 28.94%
 23.63%Square area 50x50 km:
 0.28%
 0.6%
 0.76%
 0.66%
 0.86%
 0.86%
 0.57%
 1.47%
 0.97%
 5.78%
 87.19%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
35° 18' 49.8" North, 111° 10' 50.8" East
34° 44' 17" North, 111° 53' 2" East
34° 9' 29.7" North, 112° 35' 13.3" East
Some cities around Yima sort by population:
• Luoyang
		52.4 km =32.6 mi, 
96°
• Changzhi
		54 km =33.6 mi, 
345°
• Jiaozuo
		135 km =83.9 mi, 
65°
• Jincheng
		121.1 km =75.2 mi, 
45°
• Yuncheng
		87.2 km =54.2 mi, 
291°
• Songyang
		109.3 km =67.9 mi, 
106°
• Xixiang
		101.1 km =62.8 mi, 
62°
• Zijinglu
		99.4 km =61.8 mi, 
88°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016