{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950749,-0.309960,0.000000,0.000000,0.172997,-0.530638,0.829756,0.000000,-0.256651,0.787234,0.560708,0.000000,-1638683.481920,5026375.583557,3556075.234144,1],    "boundingVolume": {    "region": [1.885890,0.595183,1.886006,0.595298,0.000000,8.761658]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/7_1448511.b3dm"}}}