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Node-Mapnik

Bindings to the Mapnik tile rendering library for node.

var mapnik = require('mapnik');
var http = require('http');

var port = 8000;
var stylesheet = './examples/stylesheet.xml';

http.createServer(function(req, res) {
  res.writeHead(500, {'Content-Type': 'text/plain'});
  var map = new mapnik.Map(256, 256);
  map.load(stylesheet,
    function(err,map) {
      if (err) {
          res.end(err.message);
      }
      map.zoomAll();
      var im = new mapnik.Image(256, 256);
      map.render(im, function(err,im) {
        if (err) {
            res.end(err.message);
        } else {
            im.encode('png', function(err,buffer) {
                if (err) {
                    res.end(err.message);
                } else {
                    res.writeHead(200, {'Content-Type': 'image/png'});
                    res.end(buffer);
                }
            });
        }
      });
   }
  );
}).listen(port);

For more see 'examples/'

Development Status

Prototype at this point, API will be frequently changing.

Developed on OS X (10.6)

Tested on Debian Squeeze, Ubuntu Maverick/Natty, and Centos 5.4.

Depends

node (development headers) >= v0.2.3

mapnik 2.0 / (latest trunk >= r3055)

node-pool for some examples (npm install -g generic-pool)

expresso and >= node v0.4.x for tests (npm install expresso)

npm >= 1.0 (if you use npm to install deps)

Installation

Install node-mapnik:

$ git clone git://github.com/mapnik/node-mapnik.git
$ cd node-mapnik
$ ./configure
$ make
$ sudo make install

For more details see 'docs/install.txt'

Or you can also install via npm:

$ npm install -g mapnik

Quick rendering test

To see if things are working try rendering a world map with the sample data

From the source checkout root do:

$ ./examples/simple/render.js ./examples/stylesheet.xml map.png

Examples

See the 'examples/' folder for more usage examples.

Tests

To run the expresso tests first install expresso and step.

$ npm install -g expresso
$ npm install -g step

Then run:

$ make test

License

BSD, see LICENSE.txt

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