Night Light of Olten (Solothurn) from space (Switzerland) Src. Average luminocity for 10x10km area is 40.5938% and for 50x50km: 16.5989%.
Square area 10x10 km:
 5.06%
 7.89%
 2.83%
 6.85%
 6.99%
 5.21%
 4.17%
 3.42%
 25%
 26.93%
 5.65%Square area 50x50 km:
 1.81%
 2.4%
 1.19%
 1.88%
 2.43%
 2.71%
 2.36%
 2.48%
 4.59%
 15.29%
 62.86%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
47° 49' 27.2" North, 7° 12' 0.6" East
47° 20' 60" North, 7° 54' 11.8" East
46° 52' 17.3" North, 8° 36' 23.1" East
Some cities around Olten sort by population:
• Aarau
		11.6 km =7.2 mi, 
65°
• Zofingen
		7.6 km =4.7 mi, 
155°
• Oftringen
		4.4 km =2.7 mi, 
157°
• Oberentfelden
		10.8 km =6.7 mi, 
86°
• Rothrist
		5.1 km =3.2 mi, 
189°
• Aarburg
		3.3 km =2.1 mi, 
184°
• Trimbach
		2.1 km =1.3 mi, 
324°
• Küttigen
		13.2 km =8.2 mi, 
56°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016