Night Light of San Fernando (Andalusia) from space (Spain) Src. Average luminocity for 10x10km area is 51.3956% and for 50x50km: 15.3917%.
Square area 10x10 km:
 7.51%
 6.59%
 6.78%
 8.61%
 3.3%
 2.56%
 17.77%
 29.49%
 13%
 4.4%
 0%Square area 50x50 km:
 2.22%
 2.25%
 1.81%
 2.11%
 2.16%
 0.84%
 2.06%
 3.86%
 5.24%
 11.72%
 65.71%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
37° 2' 21.2" North, 6° 54' 4.7" West
36° 28' 33.2" North, 6° 11' 53.4" West
35° 54' 30.4" North, 5° 29' 42.2" West
Some cities around San Fernando sort by population:
• Jerez de la Frontera
		24.1 km =15 mi, 
13°
• Cadiz
		9.9 km =6.2 mi, 
304°
• El Puerto de Santa MarĂa
		13.5 km =8.4 mi, 
346°
• Chiclana de la Frontera
		7.9 km =4.9 mi, 
142°
• Puerto Real
		5.9 km =3.7 mi, 
7°
• Rota
		22.2 km =13.8 mi, 
318°
• Conil de la Frontera
		24.2 km =15 mi, 
156°
• Medina Sidonia
		24.3 km =15.1 mi, 
94°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016