{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949132,-0.314879,0.000000,0.000000,0.116084,-0.349910,0.929563,0.000000,-0.292431,0.881468,0.370807,0.000000,-1866023.612144,5624713.495252,2350309.953314,1],    "boundingVolume": {    "region": [1.891071,0.379821,1.891179,0.379936,0.000000,72.367680]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/21_77515.b3dm"}}}