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gmap_vtile.go
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gmap_vtile.go
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package petastatis
import (
"fmt"
sm "github.com/flopp/go-staticmaps"
)
// gmapVtileProvider encapsulates all infos about a map tile provider service (name, url scheme, attribution, etc.)
type gmapVtileProvider struct {
name string
attribution string
ignoreNotFound bool
tileSize int
urlPattern string // "%[1]s" => shard, "%[2]d" => zoom, "%[3]d" => x, "%[4]d" => y
}
func (t *gmapVtileProvider) Name() string {
return t.name
}
func (t *gmapVtileProvider) Attribution() string {
return t.attribution
}
func (t *gmapVtileProvider) IgnoreNotFound() bool {
return t.ignoreNotFound
}
func (t *gmapVtileProvider) TileSize() int {
return t.tileSize
}
func (t *gmapVtileProvider) Shards() []string {
return []string{}
}
func (t *gmapVtileProvider) GetURL(shard string, zoom, x, y int) string {
return fmt.Sprintf(t.urlPattern, zoom, x, y)
}
// newGMapVTile .
func newGMapVTile(layer string) sm.MapTileProvider {
t := &gmapVtileProvider{
name: "gmap-vtile-" + layer,
attribution: "Google Map V Tile",
tileSize: 256,
urlPattern: "https://mt1.google.com/vt/lyrs=" + layer + "@186112443&x=%[2]d&y=%[3]d&z=%[1]d",
}
return t
}
// GMapRoadTile .
func NewGMapRoadTile() sm.MapTileProvider {
return newGMapVTile("h")
}
// NewGMapRoadMapTile .
func NewGMapRoadMapTile() sm.MapTileProvider {
return newGMapVTile("m")
}
// NewGMapTerrainTile .
func NewGMapTerrainTile() sm.MapTileProvider {
return newGMapVTile("p")
}
// NewGMapSateliteTile .
func NewGMapSateliteTile() sm.MapTileProvider {
return newGMapVTile("s")
}
// NewGMapHybirdTile .
func NewGMapHybirdTile() sm.MapTileProvider {
return newGMapVTile("y")
}