//The heatmap layer needs to be executed after the map is loaded or triggered by clicking the button
                    //map.on('load',()=>{
                    //  Please add the heatmap layer loading operation here
                    //})


                    //testJson is the data format for heat maps,{lng:longitude,lat:latitude,count:heatmap value}
                    window.testJson = [{"lng":116.191031,"lat":39.988585,"count":40},{"lng":116.389275,"lat":39.925818,"count":51},{"lng":116.287444,"lat":39.810742,"count":62},{"lng":116.481707,"lat":39.940089,"count":73},{"lng":116.410588,"lat":39.880172,"count":84}];
                    heatmap = new nimap.Heatmap(map, {
                        radius: 25, //The influence radius (in pixels) of a heat map point will gradually spread outward from the center point within 25 pixels of this point
                        opacity: 0.8, // opacity of layer
                        gradient: {  // The color range of the layer
                            0.2: 'blue',
                            0.4: 'rgb(117,211,248)',
                            0.6: 'rgb(0, 255, 0)',
                            0.8: '#ffea00',
                            1.0: 'red'
                        }
                    });
                    heatmap.setDataSet({
                        data: window.testJson, // test data
                        max: 100   //Opposite to the gradient color above.
                    });