{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950353,-0.311174,0.000000,0.000000,0.173686,-0.530453,0.829731,0.000000,-0.257648,0.786881,0.560746,0.000000,-1645049.450141,5024124.659706,3556315.275113,1],    "boundingVolume": {    "region": [1.887175,0.595228,1.887274,0.595345,0.000000,8.789344]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/8_1454473.b3dm"}}}