Current world map setup.

gistfile1.html

<div id="map_container" style="width:300px; height:117px;"></div>

<script>
(function(window) {
  var width = $('#map_container').width();
  var height = $('#map_container').height();
  
  var data,
      xy = d3
            .geo
            .equirectangular()
            // .scale($('#map_container').width())
            // .translate([$('#map_container').width() / 2, $('#map_container').height() / 2]),
      path = d3
              .geo
              .path()
              .projection(xy),
      svg = d3
              .select('#map_container')
              .append('svg:svg'),
      countries = svg
                    .append('svg:g')
                    .attr('id', 'countries')
                    .attr('transform', "translate(" + (0-(width/2)) + ", " + (0-(height/2)) + ") scale(" + (width/503) + "," + (width/503) + ")");

  /* World Map */
  countries.selectAll('path')
    .data(window.countries_data.features)
    .enter()
    .append('svg:path')
    .attr('d', path)
    .attr('fill', '#ddd')
    .attr('stroke', '#fff')
    .attr('stroke-width', .5);

}(this));
</script>