Night Light of Guankou (Hunan) from space (China) Src. Average luminocity for 10x10km area is 15.9621% and for 50x50km: 1.3728%.
Square area 10x10 km:
Square area 50x50 km:
Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
28° 46' 36.2" North, 112° 55' 26.3" East
28° 9' 31" North, 113° 37' 37.5" East
27° 32' 12.9" North, 114° 19' 48.8" East
Some cities around Guankou sort by population:
• Changsha
64.5 km =40.1 mi, 273°
• Zhuzhou
59.2 km =36.8 mi, 232°
• Xiangtan
79.2 km =49.2 mi, 244°
• Pingxiang
64.2 km =39.9 mi, 159°
• Yichun
84.1 km =52.3 mi, 115°
• Xishan
56.1 km =34.9 mi, 192°
• Wenxing
93.5 km =58.1 mi, 308°
• Yutan
105.1 km =65.3 mi, 276°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016