Night Light of Lanzhou (Gansu) from space (China) Src. Average luminocity for 10x10km area is 80.3608% and for 50x50km: 16.3215%.
Square area 10x10 km:
Square area 50x50 km:
Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
36° 37' 24.2" North, 103° 8' 12.3" East
36° 3' 25.2" North, 103° 50' 23.5" East
35° 29' 11.5" North, 104° 32' 34.8" East
Some cities around Lanzhou sort by population:
• Tianshui
238.3 km =148.1 mi, 133°
• Xining
196.9 km =122.3 mi, 288°
• Wuwei
233.9 km =145.3 mi, 332°
• Linxia Chengguanzhen
76.4 km =47.5 mi, 228°
• Baiyin
62 km =38.5 mi, 28°
• Pingliang
263.1 km =163.5 mi, 102°
• Beidao
249.2 km =154.8 mi, 131°
• Mawu
205.9 km =127.9 mi, 151°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016