Night Light of Seonghwan (Chungcheongnam-do) from space (South Korea) Src. Average luminocity for 10x10km area is 61.5682% and for 50x50km: 47.4091%.
Square area 10x10 km:
 1.3%
 1.3% 1.95%
 1.95% 8.77%
 8.77% 9.09%
 9.09% 30.84%
 30.84% 33.77%
 33.77% 10.88%
 10.88% 3.41%
 3.41% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 3.98%
 3.98% 7.34%
 7.34% 6.19%
 6.19% 7.73%
 7.73% 14.61%
 14.61% 11.29%
 11.29% 6.81%
 6.81% 6.18%
 6.18% 8.82%
 8.82% 15.15%
 15.15% 11.9%
 11.9%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
37° 28' 32.3" North, 126° 25' 41.8" East
36° 54' 56" North, 127° 7' 53" East
36° 21' 4.8" North, 127° 50' 4.3" East
Some cities around Seonghwan sort by population:
• Hwaseong-si
		42.7 km =26.5 mi,  319°
319°
• Cheonan
		12.3 km =7.6 mi,  171°
171°
• Sejong
		38.7 km =24 mi,  158°
158°
• Osan
		26.9 km =16.7 mi,  348°
348°
• Asan
		18.5 km =11.5 mi,  217°
217°
• Anseong
		16.3 km =10.1 mi,  49°
49°
• Chinch'ŏn
		28.5 km =17.7 mi,  103°
103°
• Yesan
		36.9 km =22.9 mi,  224°
224°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016