{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.952395,-0.304865,0.000000,0.000000,0.168801,-0.527333,0.832722,0.000000,-0.253343,0.791441,0.556271,0.000000,-1617535.688953,5053158.264617,3527877.858776,1],    "boundingVolume": {    "region": [1.880540,0.589848,1.880647,0.589936,0.000000,8.703694]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/6/15/21_1322808.b3dm"}}}