{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950650,-0.310267,0.000000,0.000000,0.173509,-0.531628,0.829015,0.000000,-0.256673,0.786442,0.561808,0.000000,-1638830.662994,5021339.774897,3563067.717488,1],    "boundingVolume": {    "region": [1.886221,0.596520,1.886319,0.596619,0.000000,11.649337]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/3/6_1391275.b3dm"}}}