Night Light of Mértola (Beja) from space (Portugal) Src. Average luminocity for 10x10km area is 2.1667% and for 50x50km: 0.5885%.
Square area 10x10 km:
 0.34%
 0.34%
 0%
 0.51%
 0.17%
 0.68%
 0%
 0%
 0.85%
 1.19%
 95.92%Square area 50x50 km:
 0.01%
 0.01%
 0.08%
 0.08%
 0.1%
 0.17%
 0.07%
 0.27%
 0.18%
 0.24%
 98.78%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
38° 11' 51.8" North, 8° 21' 51.2" West
37° 38' 34.9" North, 7° 39' 40" West
37° 5' 3.1" North, 6° 57' 28.7" West
Some cities around Mértola sort by population:
• Beja
		45 km =28 mi, 
336°
• Ayamonte, ES
		52.7 km =32.7 mi, 
154°
• Tavira
		57.4 km =35.7 mi, 
178°
• Vila Real de Santo António
		54.3 km =33.7 mi, 
156°
• Almodôvar
		38 km =23.6 mi, 
247°
• Serpa
		34.1 km =21.2 mi, 
9°
• Aljustrel
		51.4 km =31.9 mi, 
300°
• Castro Marim
		50.7 km =31.5 mi, 
157°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016