{ "layers": [ { "layerId": 0, "layerName": "可视域", "layerType": "Feature Layer", "minScale": 0, "maxScale": 0, "legend": [ { "label": "", "url": "ccbdc886f6da36f1e42c9d87dcfbc459", "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgb7PGP5TYtBmKQZGFAOpBUYNHDVw1MBRA+lsIKw8o5qB1AIAT6sEHxs/3LcAAAAASUVORK5CYII=", "contentType": "image/png", "height": 20, "width": 20 } ] } ] }