Night Light of Ōyama (Shizuoka) from space (Japan) Src. Average luminocity for 10x10km area is 7.1066% and for 50x50km: 7.9547%.
Square area 10x10 km:
 0%
 0.7%
 0%
 1.4%
 0.7%
 0.7%
 2.1%
 2.1%
 4.72%
 3.5%
 84.09%Square area 50x50 km:
 0.18%
 0.86%
 0.81%
 1.06%
 1.22%
 1.56%
 1.68%
 1.25%
 3.42%
 9.72%
 78.23%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
35° 10' 49.1" North, 137° 30' 50.7" East
34° 36' 12.9" North, 138° 13' 1.9" East
34° 1' 22.2" North, 138° 55' 13.2" East
Some cities around Ōyama sort by population:
• Fujieda
		29.6 km =18.4 mi, 
8°
• Yaizu
		30.9 km =19.2 mi, 
17°
• Iwata
		35.3 km =21.9 mi, 
287°
• Kakegawa
		25.8 km =16 mi, 
314°
• Shimada
		23.9 km =14.9 mi, 
352°
• Fukuroi
		31.9 km =19.8 mi, 
300°
• Sagara
		9.1 km =5.7 mi, 
352°
• Kanaya
		25.4 km =15.8 mi, 
341°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016