Night Light of Salem (Tamil Nadu) from space (India) Src. Average luminocity for 10x10km area is 93.2121% and for 50x50km: 35.1293%.
Square area 10x10 km:
 39.61%
 37.66%
 13.2%
 3.9%
 2.16%
 2.38%
 1.08%
 0%
 0%
 0%
 0%Square area 50x50 km:
 1.63%
 3.68%
 6.55%
 6.36%
 6.96%
 10.1%
 7.95%
 6.08%
 6.9%
 12.87%
 30.93%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
12° 20' 29.5" North, 77° 27' 8.1" East
11° 39' 13.5" North, 78° 9' 19.4" East
10° 57' 51.4" North, 78° 51' 30.6" East
Some cities around Salem sort by population:
• Rasipuram
		21.8 km =13.5 mi, 
171°
• Tāramangalam
		20.6 km =12.8 mi, 
282°
• Nāmagiripettai
		25.3 km =15.7 mi, 
150°
• Mallasamudram
		22.4 km =13.9 mi, 
217°
• Āttayyāmpatti
		17.4 km =10.8 mi, 
219°
• Omalur
		15.4 km =9.6 mi, 
309°
• Ilampillai
		17 km =10.6 mi, 
252°
• Māllūr
		12.3 km =7.6 mi, 
187°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016