{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950035,-0.312143,0.000000,0.000000,0.174301,-0.530500,0.829572,0.000000,-0.258401,0.786466,0.560982,0.000000,-1649856.458513,5021478.572971,3557815.244801,1],    "boundingVolume": {    "region": [1.888163,0.595506,1.888327,0.595637,0.000000,8.688565]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1457129.b3dm"}}}