Night Light of Longjiang (Heilongjiang) from space (China) Src. Average luminocity for 10x10km area is 16.7277% and for 50x50km: 0.8651%.
Square area 10x10 km:
 2.53%
 2.23%
 1.19%
 2.68%
 0.89%
 2.38%
 2.68%
 1.64%
 5.21%
 7.29%
 71.28%Square area 50x50 km:
 0.1%
 0.11%
 0.07%
 0.11%
 0.07%
 0.16%
 0.11%
 0.13%
 0.28%
 0.33%
 98.53%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
47° 48' 18.4" North, 122° 28' 30.1" East
47° 19' 50.6" North, 123° 10' 41.4" East
46° 51' 7.3" North, 123° 52' 52.6" East
Some cities around Longjiang sort by population:
• Qiqihar
		59 km =36.7 mi, 
88°
• Hulan Ergi
		37.1 km =23.1 mi, 
112°
• Zhalantun
		82.4 km =51.2 mi, 
336°
• Fuyu
		109.1 km =67.8 mi, 
61°
• Tailai
		106.2 km =66 mi, 
170°
• Nianzishan
		30.3 km =18.8 mi, 
312°
• Gannan
		69.3 km =43.1 mi, 
20°
• Taikang
		109 km =67.7 mi, 
118°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016