{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949652,-0.313306,0.000000,0.000000,0.174932,-0.530232,0.829610,0.000000,-0.259375,0.786186,0.560925,0.000000,-1656076.341451,5019689.604502,3557452.393820,1],    "boundingVolume": {    "region": [1.889419,0.595461,1.889518,0.595543,0.000000,18.708401]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/1/2_1457516.b3dm"}}}