Night Light of Tiruvallur (Tamil Nadu) from space (India) Src. Average luminocity for 10x10km area is 53.3874% and for 50x50km: 36.0499%.
Square area 10x10 km:
 0.22%
 6.71%
 19.91%
 9.74%
 7.36%
 10.17%
 6.71%
 13.85%
 12.34%
 12.99%
 0%Square area 50x50 km:
 2.12%
 6.56%
 9.96%
 4.17%
 5.46%
 6.58%
 6.4%
 6.1%
 7.09%
 10.85%
 34.71%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
13° 49' 39" North, 79° 12' 20.8" East
13° 8' 37.5" North, 79° 54' 32" East
12° 27' 29.2" North, 80° 36' 43.3" East
Some cities around Tiruvallur sort by population:
• Ambattūr
		27.8 km =17.3 mi, 
100°
• Āvadi
		22 km =13.7 mi, 
98°
• Arakkonam
		26.6 km =16.5 mi, 
255°
• Poonamalle
		24.7 km =15.3 mi, 
115°
• Tinnanūr
		13.2 km =8.2 mi, 
104°
• Srīperumbūdūr
		19.9 km =12.4 mi, 
169°
• Nandambakkam
		25.2 km =15.7 mi, 
136°
• Vellānūr
		21.4 km =13.3 mi, 
85°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016