github.com/mattfarina/geo-go

Geo

A library in Go dealing with earth coordinate system (geodetic) calculations.

Locations

Locations are individual locations on the Earth.

location := NewLocation(lat, long)

From locations you can do things like calculate the distance between two of them. For example,

l1 := NewLocation(lat1, long1)
l2 := NewLocation(lat2, long2)
distance := l1.Distance(l2)

You can also us a location to find a range or longitudes and latitudes. This is useful for finding the corners on the little rectangle screens we look at too often. For example,

location := NewLocation(42.7186, -84.468466)
latMin, latMax := location.LatitudeRange(10000)
longMin, longMax := location.LongitudeRange(20000)

There are other operations you can find in the location.go code.

Earth

These locations are on the Earth and information for the earth is stored on Earth. For example, the method EarthRadius will return the radius of the Earth at a specified latitude. This takes into account that the earth is an irregular ellipsoid.

There are other operations that can be performed on the Earth. For more details see earth.go.