Night Light of Hongjiang (Hunan) from space (China) Src. Average luminocity for 10x10km area is 4.6458% and for 50x50km: 0.546%.
Square area 10x10 km:
 0%
 0.76%
 0.19%
 1.33%
 0%
 1.52%
 1.52%
 0.76%
 1.14%
 0.38%
 92.42%Square area 50x50 km:
 0.01%
 0.08%
 0.01%
 0.14%
 0.09%
 0.11%
 0.18%
 0.12%
 0.09%
 0.06%
 99.1%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
27° 44' 2.8" North, 109° 17' 32.8" East
27° 6' 36" North, 109° 59' 44" East
26° 28' 56.6" North, 110° 41' 55.3" East
Some cities around Hongjiang sort by population:
• Fenghuang
		99.8 km =62 mi, 
336°
• Huaihua
		50.4 km =31.3 mi, 
0°
• Tongren
		104.7 km =65.1 mi, 
310°
• Anjiang
		25.6 km =15.9 mi, 
24°
• Shijiang
		79 km =49.1 mi, 
92°
• Qiancheng
		24.2 km =15 mi, 
290°
• Liuduzhai
		97.1 km =60.3 mi, 
72°
• Simenqian
		97.5 km =60.6 mi, 
64°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016