58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
package gountries
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// BaseLang is a basic structure for common language formatting in the JSON file
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type BaseLang struct {
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Common string `json:"common"`
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Official string `json:"official"`
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}
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// Geo contains geographical information
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type Geo struct {
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Region string `json:"region"`
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SubRegion string `json:"subregion"`
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Continent string // Yaml
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Capital string `json:"capital"`
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Area float64
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}
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// Coordinates contains the coordinates for both Country and SubDivision
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type Coordinates struct {
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LongitudeString string `json:"longitude"`
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LatitudeString string `json:"latitude"`
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MinLongitude float64
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MinLatitude float64
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MaxLongitude float64
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MaxLatitude float64
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Latitude float64
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Longitude float64
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}
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// MeasureDistancePythagoras measures distances betweeen two countries using
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// Pythagoras equirect angular equation
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func MeasureDistancePythagoras(m1 Measurer, m2 Measurer) (distance float64) {
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m1Long, m1Lat := m1.MeasurableCoordinates()
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m2Long, m2Lat := m2.MeasurableCoordinates()
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return CalculatePythagorasEquirectangular(m1Lat, m1Long, m2Lat, m2Long)
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}
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// MeasureDistanceHaversine measures distances betweeen two countries using
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// Havesine equation
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func MeasureDistanceHaversine(m1 Measurer, m2 Measurer) (distance float64) {
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m1Long, m1Lat := m1.MeasurableCoordinates()
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m2Long, m2Lat := m2.MeasurableCoordinates()
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return CalculateHaversine(m1Lat, m1Long, m2Lat, m2Long)
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}
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// Measurer provides coordinates for measurements
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type Measurer interface {
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MeasurableCoordinates() (lat, long float64)
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}
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