Night Light of Shangmei (Hunan) from space (China) Src. Average luminocity for 10x10km area is 23.7123% and for 50x50km: 1.9166%.
Square area 10x10 km:
 3.37%
 5.75%
 2.78%
 0.6%
 2.58%
 2.78%
 4.76%
 3.57%
 1.59%
 17.26%
 54.96%Square area 50x50 km:
 0.19%
 0.32%
 0.22%
 0.06%
 0.3%
 0.25%
 0.31%
 0.33%
 0.29%
 0.91%
 96.83%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
28° 21' 47.8" North, 110° 35' 32.8" East
27° 44' 34" North, 111° 17' 44" East
27° 7' 7.4" North, 111° 59' 55.3" East
Some cities around Shangmei sort by population:
• Loudi
		68.8 km =42.8 mi, 
90°
• Lengshuijiang
		14.5 km =9 mi, 
114°
• Xiangxiang
		121.8 km =75.7 mi, 
90°
• Yongfeng
		94.2 km =58.5 mi, 
111°
• Lianyuan
		36.8 km =22.9 mi, 
99°
• Shijiang
		88.6 km =55.1 mi, 
214°
• Liuduzhai
		54.9 km =34.1 mi, 
220°
• Simenqian
		49.3 km =30.6 mi, 
234°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016