func NewTileRenderer(stylesheet string) *TileRenderer {
t := new(TileRenderer)
var err error
if err != nil {
log.Fatal(err)
}
t.m = mapnik.NewMap(256, 256)
t.m.Load(stylesheet)
t.mp = t.m.Projection()
return t
}
// Render a simple map of europe to a PNG file
func SimpleExample() {
m := mapnik.NewMap(1600, 1200)
defer m.Free()
m.Load("sampledata/stylesheet.xml")
fmt.Println(m.SRS())
// Perform a projection that is only neccessary because stylesheet.xml
// is using EPSG:3857 rather than WGS84
p := m.Projection()
ll := p.Forward(mapnik.Coord{0, 35}) // 0 degrees longitude, 35 degrees north
ur := p.Forward(mapnik.Coord{16, 70}) // 16 degrees east, 70 degrees north
m.ZoomToMinMax(ll.X, ll.Y, ur.X, ur.Y)
blob, err := m.RenderToMemoryPng()
if err != nil {
fmt.Println(err)
return
}
ioutil.WriteFile("mapnik.png", blob, 0644)
}