nvdnkpr / osm-read

an openstreetmap XML data parser for node.js

osm-read - an openstreetmap XML and PBF parser for node.js

1) Introduction
2) Usage Examples
2.1) Simple Usage Example
2.2) Parse OSM XML from URL Example
2.3) PBF random access parser
3) TODOs
4) License
5) Contact

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Introduction

osm-read parses openstreetmap XML and PBF files as described in
http://wiki.openstreetmap.org/wiki/OSM_XML and
http://wiki.openstreetmap.org/wiki/PBF_Format


------------------------------------------------------------------------
Simple Usage Example

The following code is used to parse openstreetmap XML or PBF files in a
SAX parser like callback way.

osmread.parse({
    filePath: 'path/to/osm.xml',
    endDocument: function(){
        console.log('document end');
    },
    bounds: function(bounds){
        console.log('bounds: ' + JSON.stringify(bounds));
    },
    node: function(node){
        console.log('node: ' + JSON.stringify(node));
    },
    way: function(way){
        console.log('way: ' + JSON.stringify(way));
    },
    error: function(msg){
        console.log('error: ' + msg);
    }
});


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Parse OSM XML from URL Example

Currently you can only parse OSM data in XML from URLs. Here's an example:

osmread.parse({
    url: 'http://overpass-api.de/api/interpreter?data=node(51.93315273540566%2C7.567176818847656%2C52.000418429293326%2C7.687854766845703)%5Bhighway%3Dtraffic_signals%5D%3Bout%3B',
    format: 'xml',
    endDocument: function(){
        console.log('document end');
    },
    bounds: function(bounds){
        console.log('bounds: ' + JSON.stringify(bounds));
    },
    node: function(node){
        console.log('node: ' + JSON.stringify(node));
    },
    way: function(way){
        console.log('way: ' + JSON.stringify(way));
    },
    error: function(msg){
        console.log('error: ' + msg);
    }
});


------------------------------------------------------------------------
PBF random access parser

The following code allows to create a random access openstreetmap PBF
file parser:

osmread.createPbfParser({
    filePath: 'path/to/osm.pbf',
    callback: function(err, parser){
        var headers;

        if(err){
            // TODO handle error
        }

        headers = parser.findFileBlocksByBlobType('OSMHeader');

        parser.readBlock(headers[0], function(err, block){
            console.log('header block');
            console.log(block);

            parser.close(function(err){
                if(err){
                    // TODO handle error
                }
            });
        });
    });
});

Don't forget to close the parse after usage!


------------------------------------------------------------------------
TODOs

* parse timestamps


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License

See file COPYING for details.


------------------------------------------------------------------------
Contact

* author: Markus Pielmeier <[e-mail]>