Night Light of Altach (Vorarlberg) from space (Austria) Src. Average luminocity for 10x10km area is 23.7396% and for 50x50km: 8.8149%.
Square area 10x10 km:
 0.3%
 1.49%
 1.19%
 2.23%
 7.74%
 4.32%
 5.21%
 4.61%
 4.02%
 40.18%
 28.72%Square area 50x50 km:
 0.48%
 1.08%
 0.75%
 1.07%
 1.43%
 1.54%
 1.71%
 1.25%
 2.18%
 9.11%
 79.39%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
47° 49' 27.2" North, 8° 56' 48.7" East
47° 21' 0" North, 9° 39' 0" East
46° 52' 17.3" North, 10° 21' 11.3" East
Some cities around Altach sort by population:
• Lustenau
		8.5 km =5.3 mi, 
4°
• Hohenems
		3.1 km =1.9 mi, 
53°
• Rankweil
		8.8 km =5.5 mi, 
183°
• Götzis
		2.3 km =1.4 mi, 
214°
• Altstätten, CH
		8.3 km =5.2 mi, 
291°
• Oberriet, CH
		7 km =4.3 mi, 
242°
• Au, CH
		9.1 km =5.7 mi, 
352°
• Diepoldsau, CH
		4 km =2.5 mi, 
5°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016