h = container.node().offsetWidth,
        margin = {top: 0, right: 0, bottom: 0, left: 0},
        height = 100;

    var timeExtent = d3.extent(data.features, function(d) {
        return new Date(d.properties.time);
    });

    var svg = container.append('svg')
        .attr('width', width + margin.left + margin.right)
        .attr('height', height + margin.top + margin.bottom);

    var context = svg.append('g')
        .attr('class', 'context')
        .attr('transform', 'translate(' +
            mar