Night Light of Yongsan-dong (Seoul) from space (South Korea) Src. Average luminocity for 10x10km area is 99.8636% and for 50x50km: 86.069%.
Square area 10x10 km:
 92.05%
 92.05% 7.95%
 7.95% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 34.93%
 34.93% 22.85%
 22.85% 13.46%
 13.46% 11.72%
 11.72% 6.73%
 6.73% 3.98%
 3.98% 3.26%
 3.26% 2.05%
 2.05% 0.81%
 0.81% 0.21%
 0.21% 0%
 0%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
38° 5' 59.7" North, 126° 16' 50.1" East
37° 32' 40.2" North, 126° 59' 1.3" East
36° 59' 5.7" North, 127° 41' 12.6" East
Some cities around Yongsan-dong sort by population:
• Seoul
		2.4 km =1.5 mi,  348°
348°
• Goyang-si
		18.1 km =11.2 mi,  313°
313°
• Seongnam-si
		18 km =11.2 mi,  130°
130°
• Bucheon-si
		18.4 km =11.4 mi,  254°
254°
• Anyang-si
		17.6 km =10.9 mi,  196°
196°
• Kwangmyŏng
		12.8 km =8 mi,  234°
234°
• Guri-si
		15 km =9.3 mi,  66°
66°
• Hanam
		19.6 km =12.2 mi,  91°
91°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016