Night Light of Waltham (Massachusetts) from space (United States) Src. Average luminocity for 10x10km area is 80.6333% and for 50x50km: 57.3414%.
Square area 10x10 km:
 20.95%
 20.95% 26.83%
 26.83% 12.7%
 12.7% 13.49%
 13.49% 8.89%
 8.89% 4.6%
 4.6% 6.19%
 6.19% 3.81%
 3.81% 2.54%
 2.54% 0%
 0% 0%
 0%Square area 50x50 km:
 13.48%
 13.48% 11.95%
 11.95% 6.54%
 6.54% 7.62%
 7.62% 9.92%
 9.92% 9.68%
 9.68% 6.35%
 6.35% 5.51%
 5.51% 9.07%
 9.07% 16.07%
 16.07% 3.81%
 3.81%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
42° 53' 37.5" North, 71° 56' 19.5" West
42° 22' 35.4" North, 71° 14' 8.2" West
41° 51' 17.7" North, 70° 31' 57" West
Some cities around Waltham sort by population:
• Newton
		4.9 km =3 mi,  153°
153°
• Arlington
		7.8 km =4.8 mi,  56°
56°
• Watertown
		4.4 km =2.7 mi,  98°
98°
• Lexington
		7.9 km =4.9 mi,  6°
6°
• Wellesley
		10.1 km =6.3 mi,  207°
207°
• Belmont
		5.2 km =3.2 mi,  65°
65°
• Weston
		5.6 km =3.5 mi,  258°
258°
• Lincoln
		7.9 km =4.9 mi,  314°
314°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016