Night Light of Chinna Salem (Tamil Nadu) from space (India) Src. Average luminocity for 10x10km area is 16.4545% and for 50x50km: 6.3671%.
Square area 10x10 km:
 0%
 2.6%
 0.43%
 1.52%
 1.08%
 3.46%
 6.06%
 5.63%
 4.76%
 5.41%
 69.05%Square area 50x50 km:
 0.01%
 0.65%
 0.34%
 0.7%
 0.49%
 1.23%
 1.89%
 2%
 2.14%
 4.36%
 86.17%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
12° 19' 19.3" North, 78° 10' 15.6" East
11° 38' 3.2" North, 78° 52' 26.8" East
10° 56' 40.9" North, 79° 34' 38.1" East
Some cities around Chinna Salem sort by population:
• Attur
		30 km =18.6 mi, 
261°
• Kallakkurichchi
		15 km =9.3 mi, 
38°
• Perambalur
		44.6 km =27.7 mi, 
178°
• Pennādam
		47.5 km =29.5 mi, 
122°
• Arumbāvūr
		32.3 km =20.1 mi, 
209°
• Gangavalli
		28.7 km =17.8 mi, 
238°
• Vīraganūr
		23.2 km =14.4 mi, 
220°
• Alagāpuram
		28.5 km =17.7 mi, 
9°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016