{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949063,-0.315087,0.000000,0.000000,0.176123,-0.530495,0.829190,0.000000,-0.260717,0.785296,0.561549,0.000000,-1664645.223023,5014018.964314,3561421.037928,1],    "boundingVolume": {    "region": [1.891276,0.596203,1.891413,0.596310,0.000000,8.768397]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/7/12_1446977.b3dm"}}}