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geo_point.go 1.25 KB
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// Copyright 2012-2015 Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.
package elastic
import (
"fmt"
"strconv"
"strings"
)
// GeoPoint is a geographic position described via latitude and longitude.
type GeoPoint struct {
Lat, Lon float64
}
// Source returns the object to be serialized in Elasticsearch DSL.
func (pt *GeoPoint) Source() map[string]float64 {
return map[string]float64{
"lat": pt.Lat,
"lon": pt.Lon,
}
}
// GeoPointFromLatLon initializes a new GeoPoint by latitude and longitude.
func GeoPointFromLatLon(lat, lon float64) *GeoPoint {
return &GeoPoint{Lat: lat, Lon: lon}
}
// GeoPointFromString initializes a new GeoPoint by a string that is
// formatted as "{latitude},{longitude}", e.g. "40.10210,-70.12091".
func GeoPointFromString(latLon string) (*GeoPoint, error) {
latlon := strings.SplitN(latLon, ",", 2)
if len(latlon) != 2 {
return nil, fmt.Errorf("elastic: %s is not a valid geo point string", latLon)
}
lat, err := strconv.ParseFloat(latlon[0], 64)
if err != nil {
return nil, err
}
lon, err := strconv.ParseFloat(latlon[1], 64)
if err != nil {
return nil, err
}
return &GeoPoint{Lat: lat, Lon: lon}, nil
}
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