Night Light of Seongnam-si (Gyeonggi-do) from space (South Korea) Src. Average luminocity for 10x10km area is 90.5925% and for 50x50km: 75.576%.
Square area 10x10 km:
 35.06%
 35.06% 30.84%
 30.84% 12.5%
 12.5% 10.88%
 10.88% 9.58%
 9.58% 1.14%
 1.14% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 27.84%
 27.84% 18.31%
 18.31% 10.25%
 10.25% 10.78%
 10.78% 7.81%
 7.81% 6.3%
 6.3% 4.96%
 4.96% 3.91%
 3.91% 3.06%
 3.06% 2.77%
 2.77% 4.01%
 4.01%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
37° 59' 41.3" North, 126° 26' 4.8" East
37° 26' 19" North, 127° 8' 16" East
36° 52' 41.7" North, 127° 50' 27.3" East
Some cities around Seongnam-si sort by population:
• Seoul
		20 km =12.4 mi,  315°
315°
• Suwon
		20 km =12.4 mi,  214°
214°
• Anyang-si
		19.3 km =12 mi,  254°
254°
• Guri-si
		17.8 km =11.1 mi,  0°
0°
• Hanam
		12.8 km =8 mi,  27°
27°
• Wabu
		18.3 km =11.4 mi,  23°
23°
• Gwangju
		11 km =6.8 mi,  106°
106°
• Yongsan-dong
		18 km =11.2 mi,  310°
310°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016