d3.js Map () Auto Fit into Parent Container and Resize with Window

COMPLETE SOLUTION:

Here’s the solution which will resize the map AFTER the user has released the edge of the window to resize it, and center it in the parent container.

<div id="mapContainer"></div>

function draw(ht) {
    $("#mapContainer").html("<svg id='map' xmlns="http://www.w3.org/2000/svg" width="100%" height="" + ht + ""></svg>");
    map = d3.select("svg");
    var width = $("svg").parent().width();
    var height = ht;

    // I discovered that the unscaled equirectangular map is 640x360. Thus, we
    // should scale our map accordingly. Depending on the width ratio of the new
    // container, the scale will be this ratio * 100. You could also use the height 
    // instead. The aspect ratio of an equirectangular map is 2:1, so that's why
    // our height is half of our width.

    projection = d3.geo.equirectangular().scale((width/640)*100).translate([width/2, height/2]);
    var path = d3.geo.path().projection(projection);
    d3.json('plugins/maps/world.json', function(collection) {
        map.selectAll('path').data(collection.features).enter()
            .append('path')
            .attr('d', path)
            .attr("width", width)
            .attr("height", width/2);
    });
}
draw($("#mapContainer").width()/2);

$(window).resize(function() {
    if(this.resizeTO) clearTimeout(this.resizeTO);
    this.resizeTO = setTimeout(function() {
        $(this).trigger('resizeEnd');
    }, 500);
});

$(window).bind('resizeEnd', function() {
    var height = $("#mapContainer").width()/2;
    $("#mapContainer svg").css("height", height);
    draw(height);
});