Night Light of Riachão (Maranhão) from space (Brazil) Src. Average luminocity for 10x10km area is 12.4481% and for 50x50km: 0.5327%.
Square area 10x10 km:
 1.3%
 4.55%
 0.22%
 0%
 0%
 4.55%
 0.65%
 2.6%
 0.87%
 0%
 85.28%Square area 50x50 km:
 0.05%
 0.18%
 0.01%
 0%
 0%
 0.18%
 0.06%
 0.1%
 0.03%
 0%
 99.39%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
6° 39' 50.7" South, 47° 19' 13.3" West
7° 21' 43" South, 46° 37' 2" West
8° 3' 31.3" South, 45° 54' 50.8" West
Some cities around Riachão sort by population:
• Araguaína
		176.4 km =109.6 mi, 
276°
• Balsas
		66.9 km =41.6 mi, 
106°
• Grajaú
		179.5 km =111.5 mi, 
17°
• Santa Luzia
		73.2 km =45.5 mi, 
244°
• Carolina
		93.2 km =57.9 mi, 
271°
• Porto Franco
		142.8 km =88.7 mi, 
322°
• Bom Jardim
		41.1 km =25.5 mi, 
21°
• São Raimundo das Mangabeiras
		130.9 km =81.3 mi, 
73°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016