{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.858481,-0.512846,0.000000,0.000000,0.262617,-0.439610,0.858939,0.000000,-0.439724,0.736078,0.514618,0.000000,-2807108.349937,4698975.167075,3263225.429804,1],    "boundingVolume": {    "region": [2.109210,0.540500,2.109375,0.540625,0.000000,44.774900]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/8_268876.b3dm"}}}