func main() {
flag.Parse()
input := flag.Arg(0)
m, _ := mapping.NewMap(input)
r := rendering.NewRenderer(m, 256, 256)
mux := pat.New()
mux.Get("/:z/:x/:y.png", http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
q := req.URL.Query()
z_str := q.Get(":z")
x_str := q.Get(":x")
y_str := q.Get(":y")
x, _ := strconv.Atoi(x_str)
y, _ := strconv.Atoi(y_str)
z, _ := strconv.Atoi(z_str)
lng0, lat0 := util.Num2deg(x, y, z)
lng0, lat0 = util.Gps2webmerc(lng0, lat0)
lng1, lat1 := util.Num2deg(x+1, y+1, z)
lng1, lat1 = util.Gps2webmerc(lng1, lat1)
r.Lock()
r.ClipTo(lng0, lat0, lng1, lat1)
tile := r.Draw()
r.Unlock()
png.Encode(w, tile)
}))
http.Handle("/", mux)
err := http.ListenAndServe(":3001", nil)
if err != nil {
log.Fatal("ListenAndServe: ", err)
}
}
func (p *shpPoint) Point() geom.Point {
lng, lat := util.Gps2webmerc(p.x, p.y)
return geom.Point{lng, lat}
}
func (p *shpPolygonZ) Bbox() geom.Bbox {
b := p.BBox()
x0, y0 := util.Gps2webmerc(b.MinX, b.MaxY)
x1, y1 := util.Gps2webmerc(b.MaxX, b.MinY)
return geom.Bbox{x0, y0, x1, y1}
}
func (p *shpPoint) Bbox() geom.Bbox {
x, y := util.Gps2webmerc(p.x, p.y)
return geom.Bbox{x, y, x, y}
}