{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.952259,-0.305293,0.000000,0.000000,0.169241,-0.527891,0.832279,0.000000,-0.253562,0.790903,0.556937,0.000000,-1618936.209095,5049733.210630,3532108.589738,1],    "boundingVolume": {    "region": [1.880988,0.590649,1.881096,0.590737,0.000000,8.319746]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/6/20/31_1321781.b3dm"}}}