func (ex *Excavator) dredge() {
util.Info("Starting dredger")
defer ex.dredgers.Done()
for {
if val, err := ex.pbf.Decode(); err == io.EOF {
break
} else if err != nil {
ex.errs <- err
break
} else {
switch val := val.(type) {
case *osmpbf.Node:
o := &Node{val}
if o.Valid() {
ex.nodes <- o
}
case *osmpbf.Way:
o := &Way{val}
if o.Valid() {
ex.ways <- o
}
case *osmpbf.Relation:
ex.relations <- &Relation{val}
default:
ex.errs <- util.Errorf("Unknown OSM Type %T %v", val, val)
}
}
}
util.Info("Closing dredger")
}
func (s *Shape) ToCommands() (cmds []*command) {
switch s.geomType {
case vt.Tile_POINT:
move := newCmd(MoveTo, s.Head().X, s.Head().Y)
cmds = []*command{move}
case vt.Tile_LINESTRING:
move := newCmd(MoveTo, s.Head().X, s.Head().Y)
cmds = []*command{move}
for _, p := range s.points[1:] {
line := newCmd(LineTo, p.X, p.Y)
cmds = append(cmds, line)
}
case vt.Tile_POLYGON:
move := newCmd(MoveTo, s.Head().X, s.Head().Y)
cmds = []*command{move}
for _, p := range s.points[1:] {
line := newCmd(LineTo, p.X, p.Y)
cmds = append(cmds, line)
}
closep := newCmd(ClosePath)
cmds = append(cmds, closep)
default:
util.Info("Unknown Geometry in ToCommands")
cmds = []*command{}
}
return
}
func geometryFromVt(vt_type vt.Tile_GeomType, vtgeom []uint32) *Geometry {
shapes, gtype, err := vtShapes(vtgeom)
util.Check(err)
if vt_type != gtype {
util.Info("Assigned GeomType did not match sniffed %v -> %v", vt_type, gtype)
}
return newGeometry(vt_type, shapes...)
}
func (s *Shape) IsClockwise() bool {
sum := 0.0
for i, c := range s.Coordinates[:len(s.Coordinates)-1] {
n := s.Coordinates[i+1]
sum += (n.Lon - c.Lon) * (n.Lat + c.Lat)
}
if sum == 0 {
util.Info("Shape edge sum == 0, defaulting to clockwise == true")
}
return sum > 0
}
func buildTile(layer string, tf tileFeatures) *mvt.TileAdapter {
tile, features := tf.tileFeatures()
util.Info("Building tile %v with %d features", tile, len(features))
aTile := mvt.NewTileAdapter(tile.X, tile.Y, tile.Z)
aLayer := aTile.NewLayer(layer, tiles.TileSize)
for _, feature := range features {
aFeature := MvtAdapter(feature, tile)
if aFeature.Valid() {
aLayer.AddFeature(aFeature)
}
}
return aTile
}
func (ex *Excavator) Start(workers int) (err error) {
util.Info("Excavating %s with %d workers", ex.pbfpath, workers)
err = ex.pbf.Start(workers)
if err != nil {
return
}
ex.dredgers.Add(workers)
for i := 0; i < workers; i++ {
util.Info("GO DREDGE %d", i)
go ex.dredge()
}
go func() {
ex.dredgers.Wait()
ex.Close()
util.Info("Done excavating, closing channels")
}()
ex.couriers.Add(workers)
for i := 0; i < workers; i++ {
util.Info("GO COURIER %d", i)
go ex.courier()
}
ex.couriers.Wait()
return
}
// execute
source, err := getSource(c)
util.Check(err)
if force {
os.Remove(out)
}
tiles, err := InitTiles(out, upsert, desc, extent)
util.Check(err)
err = tiles.Build(source, layer, zmin, zmax)
util.Check(err)
// finalize
file, _ := os.Open(out)
defer file.Close()
stat, _ := file.Stat()
exp := float64(stat.Size()) / float64(1<<20)
util.Info("%s was successfully caught!", out)
util.Info("Diglet gained %f MB of EXP!", exp)
},
Flags: []cli.Flag{
cli.StringFlag{
Name: "o, output",
Usage: "REQUIRED: Path to write mbtiles to",
},
cli.StringFlag{
Name: "input-type",
Value: "sniff",
Usage: "Type of input files, 'sniff' will pick type based on the extension",
},
cli.BoolFlag{
Name: "f, force",
Usage: "Remove the existing .mbtiles file before running.",
func wayer(ways <-chan *osm.Way) {
for way := range ways {
util.Info("Way: %d %s", way.ID, way.Tags)
}
}
func noder(nodes <-chan *osm.Node) {
for node := range nodes {
util.Info("Node: %d %s", node.ID, node.Tags)
}
}