Echarts中用到的base64图标

legend: {
                orient: 'vertical',
                id: 1,
                y: 'bottom',
                x: 'right',
                itemWidth: 15,
                data: [{
                    name: '垃圾',
                    icon: "image://data:image/png;base64,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",
                }, {
                    name: '供水管道',
                    icon: "image://data:image/png;base64,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",
                },
                    {
                        name: '城市绿地',
                        icon: "image://data:image/png;base64,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"
                    },
                    {
                        name: '天燃气',
                        icon: "image://data:image/png;base64,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",
                    },
                    {
                        name: '井盖',
                        icon: "image://data:image/png;base64,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"
                    },
                ],
                textStyle: {
                    color: '#fff'
                }
            }

Done！