Night Light of Yancheng (Jiangsu) from space (China) Src. Average luminocity for 10x10km area is 97.2692% and for 50x50km: 17.5744%.
Square area 10x10 km:
 57.87%
 57.87% 32.52%
 32.52% 6.29%
 6.29% 2.97%
 2.97% 0.35%
 0.35% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 3.63%
 3.63% 2.81%
 2.81% 2.98%
 2.98% 1.94%
 1.94% 2.52%
 2.52% 2.25%
 2.25% 2%
 2% 2.04%
 2.04% 3.93%
 3.93% 7.44%
 7.44% 68.44%
 68.44%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
33° 56' 34.1" North, 119° 27' 15" East
33° 21' 27" North, 120° 9' 26.3" East
32° 46' 5.7" North, 120° 51' 37.5" East
Some cities around Yancheng sort by population:
• Dongtai
		57.9 km =36 mi,  165°
165°
• Xinghua
		55.4 km =34.4 mi,  212°
212°
• Gaoyou
		91.8 km =57 mi,  226°
226°
• Hede
		47.1 km =29.3 mi,  11°
11°
• Dazhong
		33 km =20.5 mi,  122°
122°
• Baoying
		80.1 km =49.8 mi,  259°
259°
• Dongkan
		77.5 km =48.2 mi,  337°
337°
• Qinnan
		25.5 km =15.8 mi,  242°
242°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016