Night Light of Massy (Île-de-France) from space (France) Src. Average luminocity for 10x10km area is 91.7173% and for 50x50km: 65.6561%.
Square area 10x10 km:
 37.95%
 37.95% 36.9%
 36.9% 6.4%
 6.4% 6.85%
 6.85% 8.63%
 8.63% 2.68%
 2.68% 0.6%
 0.6% 0%
 0% 0%
 0% 0%
 0% 0%
 0%Square area 50x50 km:
 31.2%
 31.2% 15.89%
 15.89% 4.39%
 4.39% 4.43%
 4.43% 5.12%
 5.12% 3.98%
 3.98% 5.39%
 5.39% 4.87%
 4.87% 5.31%
 5.31% 4.95%
 4.95% 14.47%
 14.47%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
49° 11' 19" North, 1° 34' 47.6" East
48° 43' 36.9" North, 2° 16' 58.8" East
48° 15' 39.5" North, 2° 59' 10.1" East
Some cities around Massy sort by population:
• Antony
		3.1 km =1.9 mi,  18°
18°
• Palaiseau
		2.6 km =1.6 mi,  248°
248°
• Fresnes
		4.3 km =2.7 mi,  42°
42°
• Longjumeau
		4 km =2.5 mi,  153°
153°
• Chilly-Mazarin
		2.8 km =1.7 mi,  118°
118°
• Verrières-le-Buisson
		2.4 km =1.5 mi,  332°
332°
• Villebon-sur-Yvette
		3.9 km =2.4 mi,  233°
233°
• Saulx-les-Chartreux
		4.2 km =2.6 mi,  195°
195°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016