6da8bd098a
Signed-off-by: Michael Mayer <michael@liquidbytes.net>
44 lines
894 B
Go
44 lines
894 B
Go
package s2
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import (
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gs2 "github.com/golang/geo/s2"
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"github.com/photoprism/photoprism/internal/event"
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)
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var log = event.Log
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var Level = 18
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func Token(lat, lng float64) string {
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return TokenLevel(lat, lng, Level)
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}
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func TokenLevel(lat, lng float64, level int) string {
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if lat == 0.0 && lng == 0.0 {
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log.Debugf("s2: no values for latitude and longitude")
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return ""
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}
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if lat < -90 || lat > 90 {
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log.Warnf("s2: latitude out of range (%f)", lat)
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return ""
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}
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if lng < -180 || lng > 180 {
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log.Warnf("s2: longitude out of range (%f)", lng)
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return ""
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}
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l := gs2.LatLngFromDegrees(lat, lng)
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return gs2.CellIDFromLatLng(l).Parent(level).ToToken()
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}
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func LatLng(token string) (lat, lng float64) {
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if token == "" || token == "-" {
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log.Warn("s2: empty token")
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return 0.0, 0.0
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}
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c := gs2.CellIDFromToken(token)
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l := c.LatLng()
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return l.Lat.Degrees(), l.Lng.Degrees()
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}
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