{"stores": [{"id": "S1", "name": "松桥店", "longitude": 120.15, "latitude": 30.28}, {"id": "S2", "name": "北岸店", "longitude": 116.4, "latitude": 39.9}, {"id": "S3", "name": "待核店", "longitude": 39.9, "latitude": 116.4}, {"id": "S4", "name": "山前店", "longitude": 118.78, "latitude": null}]}