arcgis api for js +json 实现热力图

var geodata = [ {name: '重庆', value: 10 ,pnt: [106.5468, 29.5661]}, {name: '酉阳县', value: 32 ,pnt: [108.8196, 28.8666]}, {name: '奉节县', value: 232 ,pnt:[109.3909, 30.9265]}, {name: '巫溪县', value: 354 ,pnt:[109.3359, 31.4813]}, {name: '开县', value: 87 ,pnt:[108.4131, 31.2561]}, {name: '彭水县', value: 87 ,pnt:[108.2043, 29.3994]}, {name: '云阳县', value: 364 ,pnt:[108.8306, 31.0089]}, {name: '万州区', value: 164 ,pnt:[108.3911, 30.6958]}, {name: '城口县', value: 61 ,pnt:[108.7756, 31.9098]}, {name: '江津区', value: 12 ,pnt:[106.2158, 28.9874]}, {name: '石柱县', value: 52 ,pnt:[108.2813, 30.1025]}, {name: '巫山县', value: 43 ,pnt:[109.8853, 31.1188]}, {name: '涪陵区', value: 94 ,pnt:[107.3364, 29.6796]}, {name: '丰都县', value: 57 ,pnt:[107.8418, 29.9048]}, {name: '武隆县', value: 124 ,pnt:[107.655, 29.35]}, {name: '南川区', value: 157 ,pnt:[107.1716, 29.1302]}, {name: '秀山县', value: 18 ,pnt:[109.0173, 28.5205]}, {name: '黔江区', value: 67 ,pnt:[108.7207, 29.4708]}, {name: '合川区', value: 84 ,pnt:[106.3257, 30.108]}, {name: '綦江县', value: 147 ,pnt:[106.6553, 28.8171]}, {name: '忠县', value: 184 ,pnt:[107.8967, 30.3223]}, {name: '梁平县', value: 214 ,pnt:[107.7429, 30.6519]}, {name: '巴南区', value: 244 ,pnt:[106.7322, 29.4214]}, {name: '潼南县', value: 268 ,pnt:[105.7764, 30.1135]}, {name: '永川区', value: 18 ,pnt:[105.8643, 29.2566]}, {name: '垫江县', value: 48 ,pnt:[107.4573, 30.2454]}, {name: '渝北区', value: 85 ,pnt:[106.7212, 29.8499]}, {name: '长寿区', value: 35 ,pnt:[107.1606, 29.9762]}, {name: '大足县', value: 249 ,pnt:[105.7544, 29.6136]}, {name: '铜梁县', value: 154 ,pnt:[106.0291, 29.8059]}, {name: '荣昌县', value: 257 ,pnt:[105.5127, 29.4708]}, {name: '璧山县', value: 95 ,pnt:[106.2048, 29.5807]}, {name: '北碚区', value: 108 ,pnt:[106.5674, 29.8883]}, {name: '万盛区', value: 204 ,pnt:[106.908, 28.9325]}, {name: '南岸区', value: 181 ,pnt:[106.6663, 29.5367]}, {name: '江北区', value: 192 ,pnt:[106.8311, 29.6191]}, {name: '双桥区', value: 50 ,pnt:[105.7874, 29.4928]}, {name: '渝中区', value: 10 ,pnt:[106.5344, 29.5477]} ];