files=1

    var map = L.map('map').setView([45, -119], 7);

    // a = L.tileLayer('http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png').addTo(map);
    a = L.tileLayer('http://server.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer/tile/{z}/{y}/{x}').addTo(map);

    b = L.nonTiledLayer.wms('http://mapious.ceoas.oregonstate.edu/geoserver/baldricg_PNW_ATLAS/wms?', {
//        maxZoom: 19,
//        minZoom: 0,
        layers: 'pnw_DEM_feet',
        format: 'image/geotiff',
        tra