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September 30, 2020 08:13
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Distance between two points on earth with Ruby
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| # https://www.geeksforgeeks.org/program-distance-two-points-earth/ | |
| earthRadius = 6371 # km | |
| d_lat = (origin[:lat] - destination[:lat]) / 180.0 * Math::PI | |
| d_lng = (origin[:lng] - destination[:lng]) / 180.0 * Math::PI | |
| sin_lat = Math.sin(d_lat / 2) | |
| sin_lng = Math.sin(d_lng / 2) | |
| rad_lat1 = origin[:lat] / 180.0 * Math::PI | |
| rad_lat2 = destination[:lat] / 180.0 * Math::PI | |
| a = (sin_lat * sin_lat) + (sin_lng * sin_lng) * Math.cos(rad_lat1) * Math.cos(rad_lat2) | |
| c = 2 * Math.asin(Math.sqrt(a)) | |
| distance = earthRadius * c # Distance |
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