Night Light of Beidao (Gansu) from space (China) Src. Average luminocity for 10x10km area is 35.1329% and for 50x50km: 4.7243%.
Square area 10x10 km:
Square area 50x50 km:
Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
35° 8' 44.1" North, 105° 11' 24.8" East
34° 34' 7" North, 105° 53' 36" East
33° 59' 15.4" North, 106° 35' 47.3" East
Some cities around Beidao sort by population:
• Tianshui
13.9 km =8.6 mi, 275°
• Lanzhou
249.2 km =154.8 mi, 311°
• Guangyuan
236.5 km =147 mi, 181°
• Hanzhong
196.1 km =121.9 mi, 147°
• Pingliang
129.8 km =80.7 mi, 33°
• Guozhen
136.2 km =84.6 mi, 99°
• Yuxia
257.5 km =160 mi, 102°
• Mawu
91.1 km =56.6 mi, 259°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016