{ "layers": [ { "layerId": 0, "layerName": "เส้นทางหลักสำหรับขนส่งวัตถุอันตราย", "layerType": "Feature Layer", "minScale": 0, "maxScale": 0, "legend": [ { "label": "", "url": "6d5be3a6b2123ee63e30e8186a8c49a5", "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAOklEQVQ4jWNhoDJgGTWQYsAygg38D0a4ASMDAyOyGmx8BmQDYQKEDMXHB4FRL4+odEgtwEI1k4aMgQAzuQxdnIC6jwAAAABJRU5ErkJggg==", "contentType": "image/png", "groupId": "0", "height": 20, "width": 20 } ], "legendGroups": [ { "id": "0", "heading": "" } ] } ] }