Night Light of Château-d’Olonne (Pays de la Loire) from space (France) Src. Average luminocity for 10x10km area is 19.0455% and for 50x50km: 3.1965%.
Square area 10x10 km:
 2.7%
 4.4%
 0.85%
 3.27%
 1.85%
 1.28%
 2.27%
 4.83%
 0.99%
 16.05%
 61.51%Square area 50x50 km:
 0.55%
 0.63%
 0.22%
 0.47%
 0.32%
 0.27%
 0.36%
 0.46%
 0.49%
 1.94%
 94.29%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
46° 59' 8.3" North, 2° 26' 38.8" West
46° 30' 13.8" North, 1° 44' 27.5" West
46° 1' 3.7" North, 1° 2' 16.3" West
Some cities around Château-d’Olonne sort by population:
• La Roche-sur-Yon
		29.7 km =18.5 mi, 
52°
• Les Sables-d’Olonne
		3.4 km =2.1 mi, 
256°
• Olonne-sur-Mer
		4.3 km =2.7 mi, 
325°
• Saint-Hilaire-de-Riez
		27.2 km =16.9 mi, 
328°
• Saint-Gilles-Croix-de-Vie
		26.6 km =16.5 mi, 
324°
• Aizenay
		28.2 km =17.5 mi, 
21°
• Le Poiré-sur-Vie
		34.4 km =21.4 mi, 
30°
• Saint-Hilaire-de-Talmont
		11.2 km =7 mi, 
109°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016