Night Light of Ostrołęka (Mazovia) from space (Poland) Src. Average luminocity for 10x10km area is 37.5714% and for 50x50km: 1.8867%.
Square area 10x10 km:
 8.47%
 9.52%
 3.44%
 2.25%
 4.5%
 3.97%
 3.04%
 2.38%
 10.85%
 30.56%
 21.03%Square area 50x50 km:
 0.33%
 0.43%
 0.13%
 0.13%
 0.21%
 0.19%
 0.14%
 0.16%
 0.5%
 1.86%
 95.92%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
53° 30' 23.2" North, 20° 52' 21.1" East
53° 5' 10.4" North, 21° 34' 32.4" East
52° 39' 42.6" North, 22° 16' 43.6" East
Some cities around Ostrołęka sort by population:
• Łomża
		33.8 km =21 mi, 
72°
• Wyszków
		55.4 km =34.4 mi, 
188°
• Zambrów
		46 km =28.6 mi, 
104°
• Pułtusk
		54 km =33.6 mi, 
217°
• Przasnysz
		47.1 km =29.3 mi, 
260°
• Kolno
		43.1 km =26.8 mi, 
33°
• Maków Mazowiecki
		40.2 km =25 mi, 
232°
• Małkinia Górna
		53.3 km =33.1 mi, 
145°
Sources (retrieved 2019-11-25):
» NASA, Earths city lights 1995
» NASA city lights 2003
» Earth at Night: Flat Maps 2012, 2016