Night Light of Salaberry-de-Valleyfield (Quebec) from space (Canada) Src. Average luminocity for 10x10km area is 42.897% and for 50x50km: 12.6223%.
Square area 10x10 km:
 8.18%
 8.03%
 6.82%
 3.48%
 6.97%
 2.88%
 4.39%
 6.67%
 17.73%
 26.06%
 8.79%Square area 50x50 km:
 1.42%
 2.13%
 1.41%
 1.47%
 1.51%
 1.2%
 1.93%
 2.59%
 5.33%
 10.25%
 70.76%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
45° 44' 34.5" North, 74° 50' 8.4" West
45° 15' 0.3" North, 74° 7' 57.1" West
44° 45' 10.5" North, 73° 25' 45.9" West
Some cities around Salaberry-de-Valleyfield sort by population:
• Vaudreuil-Dorion
		18.4 km =11.4 mi, 
25°
• Les Coteaux
		8.7 km =5.4 mi, 
295°
• Saint-Lazare
		16.7 km =10.4 mi, 
359°
• Pincourt
		18.9 km =11.7 mi, 
38°
• L'Île-Perrot
		20.6 km =12.8 mi, 
44°
• Notre-Dame-de-l'Île-Perrot
		20.3 km =12.6 mi, 
50°
• Coteau-du-Lac
		6.8 km =4.2 mi, 
324°
• Saint-Zotique
		9.1 km =5.7 mi, 
270°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016