Night Light of Gūduvāncheri (Tamil Nadu) from space (India) Src. Average luminocity for 10x10km area is 79.632% and for 50x50km: 57.4407%.
Square area 10x10 km:
 2.6%
 18.83%
 39.18%
 19.48%
 16.02%
 3.9%
 0%
 0%
 0%
 0%
 0%Square area 50x50 km:
 10.39%
 13.96%
 14.08%
 5.24%
 8.56%
 7.38%
 6.06%
 5.65%
 8.11%
 10.36%
 10.21%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
13° 31' 47.2" North, 79° 21' 26.7" East
12° 50' 42.7" North, 80° 3' 38" East
12° 9' 31.5" North, 80° 45' 49.2" East
Some cities around Gūduvāncheri sort by population:
• Tambaram
		11.4 km =7.1 mi, 
39°
• Pallāvaram
		16.8 km =10.4 mi, 
35°
• Srīperumbūdūr
		18.7 km =11.6 mi, 
316°
• Madambakkam
		1.7 km =1.1 mi, 
298°
• Vandalūr
		5.7 km =3.5 mi, 
22°
• Karumbākkam
		16.3 km =10.1 mi, 
168°
• Nandambakkam
		14.8 km =9.2 mi, 
3°
• Singapperumālkovil
		11.1 km =6.9 mi, 
211°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016