.jumbotron {
    background-image: url('http://www.esri.com/~/media/Images/Banners/software/arcgis-open-data-banner-lg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 350px;
    position: relative;
    z-index: 1;
}

.jumbotron h2 {
    font-weight: bold;
    font-size: 2.5rem;
    margin: auto;
    padding: 150px 0;
    text-align: center;
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1;
}