Night Light of Greenfield (Massachusetts) from space (United States) Src. Average luminocity for 10x10km area is 21.0091% and for 50x50km: 2.6747%.
Square area 10x10 km:
 0.91%
 2.42%
 2.42%
 3.18%
 2.73%
 4.85%
 5%
 2.58%
 4.85%
 15%
 56.06%Square area 50x50 km:
 0.14%
 0.24%
 0.27%
 0.27%
 0.43%
 0.44%
 0.64%
 0.5%
 0.62%
 1.88%
 94.56%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
43° 6' 11.2" North, 73° 18' 9.6" West
42° 35' 15.3" North, 72° 35' 58.3" West
42° 4' 4" North, 71° 53' 47.1" West
Some cities around Greenfield sort by population:
• Amherst
		25.4 km =15.8 mi, 
164°
• Northampton
		29.4 km =18.3 mi, 
186°
• Amherst Center
		24.5 km =15.2 mi, 
164°
• Easthampton
		36.1 km =22.4 mi, 
189°
• Montague
		7.8 km =4.8 mi, 
137°
• Athol
		30.5 km =19 mi, 
88°
• Brattleboro
		29.5 km =18.3 mi, 
6°
• North Amherst
		20.5 km =12.7 mi, 
164°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016