{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949122,-0.314909,0.000000,0.000000,0.116112,-0.349958,0.929541,0.000000,-0.292452,0.881438,0.370862,0.000000,-1866157.009105,5624524.104794,2350654.926583,1],    "boundingVolume": {    "region": [1.891102,0.379879,1.891211,0.379994,0.000000,72.367680]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/21_981.b3dm"}}}