{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950047,-0.312108,0.000000,0.000000,0.174280,-0.530504,0.829573,0.000000,-0.258372,0.786477,0.560980,0.000000,-1649670.607549,5021547.213751,3557804.615914,1],    "boundingVolume": {    "region": [1.888125,0.595504,1.888289,0.595635,0.000000,8.648813]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/9/15_1455998.b3dm"}}}