{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949056,-0.315106,0.000000,0.000000,0.176219,-0.530748,0.829007,0.000000,-0.260675,0.785116,0.561820,0.000000,-1664378.981464,5012876.443122,3563141.794916,1],    "boundingVolume": {    "region": [1.891314,0.596573,1.891416,0.596595,0.000000,5.946323]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/8_1338612.b3dm"}}}