Night Light of Portadown (Northern Ireland) from space (United Kingdom) Src. Average luminocity for 10x10km area is 24.5706% and for 50x50km: 4.6997%.
Square area 10x10 km:
 3.95%
 3.95% 5.14%
 5.14% 2.99%
 2.99% 2.63%
 2.63% 2.87%
 2.87% 2.15%
 2.15% 2.75%
 2.75% 1.56%
 1.56% 4.19%
 4.19% 26.2%
 26.2% 45.57%
 45.57%Square area 50x50 km:
 0.42%
 0.42% 0.56%
 0.56% 0.39%
 0.39% 0.56%
 0.56% 0.7%
 0.7% 0.81%
 0.81% 0.73%
 0.73% 0.68%
 0.68% 0.89%
 0.89% 3.55%
 3.55% 90.71%
 90.71%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
54° 49' 48.2" North, 7° 8' 50.9" West
54° 25' 22.9" North, 6° 26' 39.6" West
54° 0' 42.8" North, 5° 44' 28.4" West
Some cities around Portadown sort by population:
• Lisburn
		28.7 km =17.8 mi,  67°
67°
• Craigavon
		4.6 km =2.9 mi,  54°
54°
• Newry
		28.1 km =17.5 mi,  165°
165°
• Banbridge
		13.2 km =8.2 mi,  127°
127°
• Armagh
		16.5 km =10.3 mi,  240°
240°
• Dungannon
		22.7 km =14.1 mi,  293°
293°
• Coalisland
		21.2 km =13.2 mi,  308°
308°
• Crumlin
		26.5 km =16.5 mi,  34°
34°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016