OSM-Meta-util

A tool to download and process OSM Metadata. This data contains the most recent annotations around a commit to OSM. Specifically, commit text, username, bounding box, creation date and number of edits. The data is downloaded from the planet repository, which contains minutely changesets to OSM.

Once installed the tool can be used to pipe in compressed XML data between two dates and output it in JSON. OSM Meta Util can also be used in polling mode and continuously download the latest data every minute.

A joint project built by Development Seed and the American Red Cross.

Installing

Clone the repo or download it as a zip. npm install the dependencies.

Running

Require osm-meta-util in your node app.

var MetaUtil = require('osm-meta-util');

The MetaUtil constructor builds a Node Stream, so you can pipe it into stream transformers or into process.stdout

There are a few ways of using the utility:

1. Downloading between two dates

The files are named in numerical order since February 28th, 2012. They're incremented every minute. You need the file name related to the start and end date. For example, 001181708 refers to http://planet.osm.org/replication/changesets/001/181/708.osm.gz, created on 2015-02-10 20:56.

var MetaUtil = require('osm-meta-util');
// Getting historical metadata, specify a start & end
var meta = MetaUtil({
     'delay': 1000,
     'start': '001181708', //2015-02-10 20:56
     'end': '001181721' //2015-02-10 21:09
 }).pipe(process.stdout)

2. Continuously

// Live Mode! Updates every minute
var meta = MetaUtil().pipe(process.stdout)

3. Using as a command line utility

MetaUtil({
    'start': process.argv[2],
    'end': process.argv[3],
    'delay': process.argv[4]
}).pipe(process.stdout)

Use it in combination with jq

node app 001181708 001181721 1000 | jq -c '{user:.user, date: .closed_at}'