{ "layers": [ { "layerId": 0, "layerName": "干流", "layerType": "Feature Layer", "minScale": 0, "maxScale": 0, "legend": [ { "label": "", "url": "b47eaa3e9903e758b621ba374182efef", "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAACxJREFUOI1jYaAyYBk1cNTA4WvgtGf/qWJalhQjC4xBFQMZhk4Yjho4vA0EAMvcA9a+Q2XLAAAAAElFTkSuQmCC", "contentType": "image/png", "height": 20, "width": 20 } ] } ] }