要渲染的数据：[经度,维度,值]

例如：

var data = [[116.420691626, 39.4574061868, 63],[116.423620497, 39.4574061868, 228],[116.33868323, 39.4596597489, 84]]

在Echarts官方示例的基础上，修改 renderItem 函数即可

function renderItem(params, api) {            const [lngIndex, latIndex] = [api.value(0).toFixed(6), api.value(1).toFixed(6)];            const coords = params.context.coords || (params.context.coords = []);            const key = lngIndex + '-' + latIndex;            const coord = coords[key] || (coords[key] = api.coord([lngIndex, latIndex]));            console.log('coord',coord)            return {                type: 'rect',                shape: {                    x: coord[0],                    y: coord[1],                    width: 10,                    height: 10,                },                z: 1000,                style: api.style({                    stroke: 'rgba(0,0,0,0.1)'                }),                styleEmphasis: api.styleEmphasis()            };        }