A golang-implemented GCD (great-circular distance) calculator with geolocation finding feature using Google Geolocation API.
Go で実装した大円距離計算機です。Google Geolocation API で地点を検索する機能もあります。
go get github.com/mikan/gcd
GCD calculation example:
package main
import "github.com/mikan/gcd"
func main() {
from := gcd.Coordinate{Latitude: 35.7719867, Longitude: 140.3928501}
to := gcd.Coordinate{Latitude: 35.76483331, Longitude: 140.3860192}
gcd.HaversineDistance(from, to) // 60.66175074135226 (km)
}Location finding example:
package main
import "github.com/mikan/gcd"
func main() {
from, err := gcd.FindPlaceWithGoogle("API_KEY", "Haneda Airport")
if err != nil {
panic(err)
}
to, err := gcd.FindPlaceWithGoogle("API_KEY", "Narita Airport")
if err != nil {
panic(err)
}
if len(from) > 0 && len(to) > 0 {
gcd.HaversineDistance(from[0], to[0]) // 60.66175074135226 (km)
}
}go install github.com/mikan/gcd@latest
Usage:
gcd -key <API_KEY> <FROM_KEYWORD> <TO_KEYWORD>
Example:
% gcd -key xxx "Haneda Airport" "Narita Airport"
Haneda Airport:
* 35.5493932,139.7798386 羽田空港
Narita Airport:
* 35.7719867,140.3928501 成田国際空港
60.66175074135226km