Night Light of Châteaugiron (Brittany) from space (France) Src. Average luminocity for 10x10km area is 3.2656% and for 50x50km: 6.7719%.
Square area 10x10 km:
 0%
 0.57%
 0.43%
 0.14%
 0%
 0%
 1.14%
 0.57%
 0%
 0.71%
 96.45%Square area 50x50 km:
 1.7%
 1.22%
 0.45%
 0.49%
 0.39%
 0.67%
 0.93%
 1.14%
 2.1%
 3.83%
 87.09%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
48° 30' 51.2" North, 2° 12' 27" West
48° 2' 46.6" North, 1° 30' 15.8" West
47° 34' 26.7" North, 0° 48' 4.5" West
Some cities around Châteaugiron sort by population:
• Rennes
		14.6 km =9.1 mi, 
300°
• Cesson-Sévigné
		11.1 km =6.9 mi, 
318°
• Vern-sur-Seiche
		7.2 km =4.5 mi, 
268°
• Chantepie
		9.5 km =5.9 mi, 
299°
• Fouillard
		13.6 km =8.5 mi, 
335°
• Châtillon-sur-Seiche
		12.5 km =7.8 mi, 
263°
• Janzé
		9.7 km =6 mi, 
177°
• Acigné
		10 km =6.2 mi, 
345°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016