Night Light of Blackwell (Oklahoma) from space (United States) Src. Average luminocity for 10x10km area is 19.1451% and for 50x50km: 4.8308%.
Square area 10x10 km:
 1.75%
 1.92%
 5.94%
 2.97%
 0.7%
 1.75%
 1.75%
 2.45%
 0.87%
 12.59%
 67.31%Square area 50x50 km:
 0.35%
 0.59%
 1.02%
 0.77%
 0.5%
 0.68%
 0.58%
 0.69%
 0.81%
 3.21%
 90.79%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
37° 21' 55.4" North, 97° 59' 9.4" West
36° 48' 16.1" North, 97° 16' 58.2" West
36° 14' 21.9" North, 96° 34' 46.9" West
Some cities around Blackwell sort by population:
• Enid
		70 km =43.5 mi, 
229°
• Stillwater
		79.2 km =49.2 mi, 
165°
• Ponca City
		20.6 km =12.8 mi, 
121°
• Winfield
		54.7 km =34 mi, 
27°
• Arkansas City
		35.9 km =22.3 mi, 
37°
• Wellington
		51.8 km =32.2 mi, 
351°
• Mulvane
		74.6 km =46.4 mi, 
2°
• Perry
		57.3 km =35.6 mi, 
180°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016