Time zone lookup by Lon and Lat
import "github.com/ugjka/go-tz/v2"
// Loading Zone for Line Islands, Kiritimati
zone, err := tz.GetZone(tz.Point{
Lon: -157.21328, Lat: 1.74294,
})
if err != nil {
panic(err)
}
fmt.Println(zone[0])
[ugjka@archee example]$ go run main.go
Pacific/Kiritimati
Uses simplified shapefile from timezone-boundary-builder
GeoJson Simplification done with mapshaper
- The timezone shapefile is embedded in the build binary
- Supports overlapping zones
- You can load your custom geojson shapefile if you want
- Sub-millisecond lookup even on old hardware
- Shapefile is simplified using a lossy method so it may be inaccurate along the borders
- This is purely in-memory. Uses ~50MB of ram
The code used to look up the timezone for a location is licensed under the MIT License.
The data in the timezone shapefile is licensed under the Open Data Commons Open Database License (ODbL).