Package osmpbf is used to decode OpenStreetMap pbf files.
$ go get github.com/qedus/osmpbfUsage is similar to json.Decoder.
f, err := os.Open("greater-london-140324.osm.pbf")
if err != nil {
log.Fatal(err)
}
defer f.Close()
d := osmpbf.NewDecoder(f)
// use more memory from the start, it is faster
d.SetBufferSize(osmpbf.MaxBlobSize)
// start decoding with several goroutines, it is faster
err = d.Start(runtime.GOMAXPROCS(-1))
if err != nil {
log.Fatal(err)
}
var nc, wc, rc uint64
for {
if v, err := d.Decode(); err == io.EOF {
break
} else if err != nil {
log.Fatal(err)
} else {
switch v := v.(type) {
case *osmpbf.Node:
// Process Node v.
nc++
case *osmpbf.Way:
// Process Way v.
wc++
case *osmpbf.Relation:
// Process Relation v.
rc++
default:
log.Fatalf("unknown type %T\n", v)
}
}
}
fmt.Printf("Nodes: %d, Ways: %d, Relations: %d\n", nc, wc, rc)https://pkg.go.dev/github.com/qedus/osmpbf
The parseNodes code has not been tested as I can only find PBF files with DenseNode format.
An Encoder still needs to be created to reverse the process.