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phamquyhai/mercator-latlon-to-meters.rb

Forked from vasrap/mercator-latlon-to-meters.rb
Created August 24, 2018 05:11
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Lat/Lon to Meters using Mercator projection
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mercator-latlon-to-meters.rb
puts "Enter latitude in decimal degrees:"
lat_deg = gets.to_f
puts "Enter longitude in decimal degrees:"
lon_deg = gets.to_f
lon_rad = (lon_deg / 180.0 * Math::PI)
lat_rad = (lat_deg / 180.0 * Math::PI)
sm_a = 6378137.0
x = sm_a * lon_rad
y = sm_a * Math.log((Math.sin(lat_rad) + 1) / Math.cos(lat_rad))
puts "x: " + x.to_s + ", y: " + y.to_s
# More information: http://gis.stackexchange.com/questions/15269/how-to-convert-lat-long-to-meters-using-mercator-projection-in-c
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