{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.899303,-0.437326,0.000000,0.000000,0.283022,-0.581998,0.762349,0.000000,-0.332455,0.683649,0.649690,0.000000,-2123443.419670,4366583.442360,4121900.555916,1],    "boundingVolume": {    "region": [2.023332,0.707122,2.023506,0.707231,0.000000,14.281193]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_1800839.b3dm"}}}