{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950746,-0.309971,0.000000,0.000000,0.173176,-0.531167,0.829381,0.000000,-0.256543,0.786871,0.561266,0.000000,-1637993.368009,5024072.857854,3559621.568139,1],    "boundingVolume": {    "region": [1.885886,0.595805,1.886031,0.596024,0.000000,8.584499]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/13_1339939.b3dm"}}}