crimeMap = {
let container = DOM.element('div', { style: `width:${width}px;height:${width/1.6}px` });
yield container;
let map = L.map(container).setView([38.896, -77.0459], 11);
let osmLayer = L.tileLayer('https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}@2x.png', {
attribution: '© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
}).addTo(map);
let crimePoints = crimes.features.map(feature =>
feature.geometry.coordinates.slice().reverse().concat([0.1]));
let crimeLayer = heatLayer(crimePoints).addTo(map);
}