{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950697,-0.310121,0.000000,0.000000,0.173068,-0.530551,0.829797,0.000000,-0.256797,0.787230,0.560646,0.000000,-1639614.272305,5026350.298285,3555684.543719,1],    "boundingVolume": {    "region": [1.886059,0.595109,1.886174,0.595223,0.000000,8.766509]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/8/7_1449851.b3dm"}}}