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GOLANG interface for OpenStreetMap API v0.6

Introduction

Please see more inforamtion in OSM wiki: http://wiki.openstreetmap.org/wiki/API_v0.6

Installing

go get github.com/iostrovok/go-osm-api/osmapi

How use example.

See example for more inforamtion. They are in "./osmapi/example/" path.

> mkdir -p /mypath/go
> cd /mypath/go
> export OSM_URL="http://api06.dev.openstreetmap.org"
> export OSM_USER="logit_for_dev_osm_api"
> export OSM_PASSWD="password_for_dev_osm_api"
> export GOPATH="/mypath/go"; 
> go get github.com/iostrovok/go-osm-api/osmapi

# Creates new node
> go run ./src/github.com/iostrovok/go-osm-api/osmapi/example/create_node.go -lat=-0.023642 -lon=51.506358

# Upadte node with id => 12313
# Sets "name:ru" to "Поселок где-то в ЛОНДОНЕ"
> go run ./src/github.com/iostrovok/go-osm-api/osmapi/example/modify_node.go -nodeid=12313

# Delete old point 
> go run ./src/github.com/iostrovok/go-osm-api/osmapi/example/delete_node.go -nodeid=12313

Using.

Nodes

Common action

/* Request object creating */
ChSet, err := req.Changesets("modify") // "delete", "create"
if err != nil {
	log.Fatal(err)
}

Get date of exists way or node (point)

import "github.com/iostrovok/go-osm-api/osmapi"
import "log"

req := osmapi.MyRequest(login, pass)
if req == nil {
	log.Fatal("Request create")
}

/* 
	Load node's date for view information.
*/
if node, err := req.LoadNodeDate("1442930428"); err != nil {
	log.Fatal("error LoadNodeDate")
} else {
	/*  Read tags from nodes */
	log.Println( "name:en: "+ node.Tag("name:en"))
	log.Println( "name:ru: "+ node.Tag("name:ru"))
	log.Println( "name:uk: "+ node.Tag("name:uk"))
}

Create new node (point)

import "github.com/iostrovok/go-osm-api/osmapi"
import "log"

/* London is calling */
Lat := -0.023642
Lon := 51.506358

req := osmapi.MyRequest(login, pass)
if req == nil {
	log.Fatal("Request create")
}

/* Make object for request */
ChSet, err := req.Changesets("create")
if err != nil {
	log.Fatal(err)
}

ChSet.Generator("My Super System")

/* Create new node */
node, err_n := ChSet.NewNode(Lat, Lon)
if err_n != nil {
	log.Fatal(err_n)
}

/*  Set new data */
node.AddTag("name:en", "Anywhere in London")
node.AddTag("name:ru", "Поселок где-то в лондоне")
node.AddTag("name:uk", "Поселок где-то в лондоне")
node.AddTag("place", "street")

/* Delete existing tag */
node.DelTag("name")

/* Upload new data */
if newId, err := ChSet.Upload(); err != nil {
	log.Fatal(err)
} else {
	log.Printf("Create node. Id; %s\n", newId)
}
/*
	If you want to see uploaded data without sending you can use do so:
	req.SetDebug(); // eq req.SetDebug(true) 
	if newId, err := ChSet.FakeUpload(); err != nil { 
		log.Fatal(err)
	} else {
		log.Printf("Create node. Id; %s\n", newId)
	}
	req.SetDebug(false); // clean debug 
*/
/* Fixed result into OSM */
if err := ChSet.Close(); err != nil {
	log.Fatal(err)
}
/* ChSet is nil now */

Modify existing node (point)

import "github.com/iostrovok/go-osm-api/osmapi"
import "log"

req := osmapi.MyRequest(login, pass)
if req == nil {
	log.Fatal("Request create")
}

/* Make object for request */
ChSet, err := req.Changesets("modify")
if err != nil {
	log.Fatal(err)
}


/* 
	FIRST. Load node's date for modification
	"1442930428" is real point
*/
if node, err_n := ChSet.LoadNode("1442930428"); err != nil {
	log.Fatal("Node сreate")
} else {
	/*  Set new tag into data */
	node.AddTag("name:en", "Akultsevo")
	node.AddTag("name:uk", "Акульцево")
	/* Delete existing tag */
	node.DelTag("name")
}

/* 
	SECOND. Load node's date for modification
	"1442930461" is real point near "1442930428" :)
*/
if node, err := ChSet.LoadNode( "1442930461"); err != nil {
	log.Fatal("Node сreate")
} else {
	/*  Set new tag into data */
	node.AddTag("name:en", "Petrushikha")
}
/* Upload new data */
if _, err := ChSet.Upload(); err != nil {
	log.Fatal(err)
}

/* Fixed result into OSM */
if err := ChSet.Close(); err != nil {
	log.Fatal(err)
}
/* ChSet is nil now */

Delete existing node (point)

import "github.com/iostrovok/go-osm-api/osmapi"
import "log"

NodeId = "221442930428"

req := osmapi.MyRequest(login, pass)
if req == nil {
	log.Fatal("Request create")
}

/* Make object for request */
ChSet, err := req.Changesets("delete")
if err != nil {
	log.Fatal(err)
}

/* Load node's date for deleting */
if node, err_n := ChSet.LoadNode(NodeId); err != nil {
	log.Fatal("Node сreate")
} 

/* Upload new data */
if _, err := ChSet.Upload(); err != nil {
	log.Fatal(err)
}

/* Fixed result into OSM */
if err := ChSet.Close(); err != nil {
	log.Fatal(err)
}
/* ChSet is nil now */

Ways

Common action

/* Request object creating */
ChSet, err := req.Changesets("modify") // "delete", "create"
if err != nil {
	log.Fatal(err)
}

Read existing way

/* Loading existing way data */
way, err := ChSet.WayLoad("52868")
if err != nil {
	log.Fatal(err)
}

Create new way

/* Create new way */
way, err := ChSet.WayNew()
if err != nil {
	log.Fatal(err)
}

Create and add node into end of way

node, err := ChSet.NewNode("0.017183, "51.506286")
if err != nil {
	log.Fatal(err)
}
id, err := ChSet.WayAddNode(node)
if err != nil {
	log.Fatal(err)
}

Create and add node after node which has id = "123456789"

node, err := ChSet.NewNode("0.017183, "51.506286")
if err != nil {
	log.Fatal(err)
}
id, err := ChSet.WayAddNode(node, "123456789")
if err != nil {
	log.Fatal(err)
}

Tag's action

node.AddTag("name:tr", "Long way")
node.DelTag("name")

Create and add node to first place of way

node, err := ChSet.NewNode("0.017183, "51.506286")
if err != nil {
	log.Fatal(err)
}
id, err := ChSet.WayAddNode(node, "0")
if err != nil {
	log.Fatal(err)
}

Delete all nodes from way & changeset

if err := ChSet.WayDelAllNodes(); err != nil {
	log.Fatal(err)
}

Delete node with id "123456789" from way & changeset

if err := ChSet.WayDelNode("123456789"); err != nil {
	log.Fatal(err)
}

Relations

Common action

/* Request object creating */
ChSet, err := req.Changesets("modify") // "delete", "create"
if err != nil {
	log.Fatal(err)
}

Read existing relation

/* Loading existing relation data */
if _, err := ChSet.RelationLoad("12993"); err_n != nil {
if err != nil {
	log.Fatal(err)
}

Create new relation

/* Create new relation */
way, err := ChSet.RelationNew()
if err != nil {
	log.Fatal(err)
}

Add exists node and ways to relation

if err := ChSet.RelationAddMember("way", "52868", "outer"); err != nil {
	log.Fatal(err)
} 

if err := ChSet.RelationAddMember("node", "52868", "outer"); err != nil {
	log.Fatal(err)
}

Delete all members from members

if err := ChSet.RelationDelAllMembers(); err != nil {
	log.Fatal(err)
}

Delete node/way with id "52868" from members

if err := ChSet.RelationDelMember("way", "52868"); err != nil {
	log.Fatal(err)
} 

if err := ChSet.RelationDelMember("node", "52868"); err != nil {
	log.Fatal(err)
}