{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950280,-0.311397,0.000000,0.000000,0.173761,-0.530260,0.829838,0.000000,-0.257867,0.786923,0.560586,0.000000,-1646441.778427,5024393.543458,3555297.791053,1],    "boundingVolume": {    "region": [1.887409,0.595034,1.887509,0.595151,0.000000,8.636880]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/8/7_1453029.b3dm"}}}