Night Light of Chiang Saen (Chiang Rai) from space (Thailand) Src. Average luminocity for 10x10km area is 22.6667% and for 50x50km: 8.1988%.
Square area 10x10 km:
 0.2%
 2.38%
 4.56%
 3.57%
 2.58%
 1.98%
 4.56%
 1.19%
 6.15%
 39.09%
 33.73%Square area 50x50 km:
 0.37%
 0.95%
 1.46%
 0.97%
 1.11%
 0.86%
 1.83%
 1.46%
 1.95%
 6.44%
 82.59%Clear (daylight) street map image can be seen on geolist.org.
Map coordinates:
20° 55' 59.7" North, 99° 23' 1.6" East
20° 16' 30.4" North, 100° 5' 12.8" East
19° 36' 51" North, 100° 47' 24.1" East
Some cities around Chiang Saen sort by population:
• Tachilek, MM
		28.8 km =17.9 mi, 
311°
• Mae Chan
		28.3 km =17.6 mi, 
239°
• Mae Sai
		28.2 km =17.5 mi, 
308°
• Ban Houakhoua, LA
		38.4 km =23.9 mi, 
94°
• Pa Daet
		86.2 km =53.6 mi, 
186°
• Ban Houayxay, LA
		34.5 km =21.4 mi, 
90°
• Fang
		99.4 km =61.8 mi, 
246°
• Mae Chai
		107.2 km =66.6 mi, 
195°
Sources (retrieved 2019-11-25):
» Earth at Night: Flat Maps 2012, 2016