README
¶
osmpbf
Package osmpbf is used to decode OpenStreetMap pbf files.
Installation
$ go get github.com/qedus/osmpbf
Usage
Usage is similar to json.Decode.
f, err := os.Open("greater-london-140324.osm.pbf")
if err != nil {
log.Fatal(err)
}
defer f.Close()
d := osmpbf.NewDecoder(f)
err = d.Start(runtime.GOMAXPROCS(-1)) // use several goroutines for faster decoding
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)
Documentation
http://godoc.org/github.com/qedus/osmpbf
To Do
The parseNodes code has not been tested as I can only find PBF files with DenseNode format.
The code does not decode DenseInfo or Info data structures as I currently have no need for them.
An Encoder still needs to be created to reverse the process.
Documentation
¶
Overview ¶
Package osmpbf decodes OpenStreetMap (OSM) PBF files. Use this package by creating a NewDecoder and passing it a PBF file. Use Start to start decoding process. Use Decode to return Node, Way and Relation structs.
Example ¶
package main
import (
"fmt"
"github.com/qedus/osmpbf"
"io"
"log"
"os"
"runtime"
)
func main() {
f, err := os.Open("greater-london-140324.osm.pbf")
if err != nil {
log.Fatal(err)
}
defer f.Close()
d := osmpbf.NewDecoder(f)
err = d.Start(runtime.GOMAXPROCS(-1)) // use several goroutines for faster decoding
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)
}
Output: Nodes: 2729006, Ways: 459055, Relations: 12833
Index ¶
Examples ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type Decoder ¶
type Decoder struct {
// contains filtered or unexported fields
}
A Decoder reads and decodes OpenStreetMap PBF data from an input stream.
func NewDecoder ¶
NewDecoder returns a new decoder that reads from r.
func (*Decoder) Decode ¶
Decode reads the next object from the input stream and returns either a Node, Way or Relation struct representing the underlying OpenStreetMap PBF data, or error encountered. The end of the input stream is reported by an io.EOF error.
Decode is safe for parallel execution. Only first error encountered will be returned, subsequent invocations will return io.EOF.
type Member ¶
type Member struct {
ID int64
Type MemberType
Role string
}
Source Files
Directories