Night Light of Songyang (Henan) from space (China) Src. Average luminocity for 10x10km area is 25.6434% and for 50x50km: 3.8136%.
Square area 10x10 km:
Square area 50x50 km:
Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
35° 1' 58.9" North, 112° 19' 29.8" East
34° 27' 19" North, 113° 1' 41" East
33° 52' 24.6" North, 113° 43' 52.3" East
Some cities around Songyang sort by population:
• Zhengzhou
66 km =41 mi, 59°
• Luoyang
58.4 km =36.3 mi, 295°
• Pingdingshan
83.6 km =51.9 mi, 162°
• Jiaozuo
89.2 km =55.4 mi, 12°
• Yingchuan
51.6 km =32.1 mi, 129°
• Xiangcheng Chengguanzhen
79.3 km =49.3 mi, 148°
• Xixiang
80.1 km =49.8 mi, 349°
• Zijinglu
34.3 km =21.3 mi, 351°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016