{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949113,-0.314936,0.000000,0.000000,0.116118,-0.349940,0.929547,0.000000,-0.292479,0.881436,0.370847,0.000000,-1866329.581696,5624507.035857,2350559.400360,1],    "boundingVolume": {    "region": [1.891131,0.379863,1.891239,0.379978,0.000000,72.367680]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/21_668.b3dm"}}}