{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950749,-0.309962,0.000000,0.000000,0.173163,-0.531144,0.829398,0.000000,-0.256541,0.786890,0.561240,0.000000,-1637982.536418,5024193.033253,3559458.032385,1],    "boundingVolume": {    "region": [1.885877,0.595774,1.886022,0.595993,0.000000,8.813958]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/12_1422107.b3dm"}}}