Night Light of Dadonghai (Hainan) from space (China) Src. Average luminocity for 10x10km area is 59.9481% and for 50x50km: 16.5552%.
Square area 10x10 km:
Square area 50x50 km:
Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
18° 53' 13.7" North, 108° 48' 25.8" East
18° 13' 14" North, 109° 30' 37" East
17° 33' 5.1" North, 110° 12' 48.3" East
Some cities around Dadonghai sort by population:
• Qionghai
151.7 km =94.3 mi, 41°
• Xiuying
214.4 km =133.2 mi, 22°
• Sanya
2.6 km =1.6 mi, 347°
• Wenchang
202.6 km =125.9 mi, 40°
• Qiongshan
217.4 km =135.1 mi, 24°
• Jinjiang
175.7 km =109.2 mi, 17°
• Wanning
112.4 km =69.8 mi, 55°
• Lincheng
188.5 km =117.1 mi, 5°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016