{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950043,-0.312119,0.000000,0.000000,0.174286,-0.530501,0.829574,0.000000,-0.258381,0.786475,0.560978,0.000000,-1649729.600545,5021535.469951,3557793.909280,1],    "boundingVolume": {    "region": [1.888137,0.595502,1.888300,0.595633,0.000000,8.648813]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1455972.b3dm"}}}