{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949076,-0.315048,0.000000,0.000000,0.116175,-0.349976,0.929527,0.000000,-0.292576,0.881381,0.370899,0.000000,-1866952.674718,5624162.038484,2350887.846503,1],    "boundingVolume": {    "region": [1.891249,0.379919,1.891357,0.380034,0.000000,70.386220]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/21_1415.b3dm"}}}