{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949108,-0.314950,0.000000,0.000000,0.116113,-0.349908,0.929560,0.000000,-0.292496,0.881444,0.370814,0.000000,-1866439.128605,5624557.919412,2350352.049836,1],    "boundingVolume": {    "region": [1.891146,0.379828,1.891254,0.379943,0.000000,72.367680]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/21_77584.b3dm"}}}