{
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        "https://iserver.supermap.io/iserver/services/data-changchun/rest/data/datasources/Changchun/datasets/RoadNet_Node/fields/SmNodeID/SUM",
        "https://iserver.supermap.io/iserver/services/data-changchun/rest/data/datasources/Changchun/datasets/RoadNet_Node/fields/SmNodeID/VARIANCE"
    ],
    "fieldInfo": {
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        "defaultValue": "-1",
        "name": "SmNodeID",
        "caption": "SmNodeID",
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        "isZeroLengthAllowed": true,
        "isSystemField": true
    }
}