{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949670,-0.313251,0.000000,0.000000,0.174452,-0.528877,0.830576,0.000000,-0.259635,0.787124,0.559487,0.000000,-1657725.934628,5025652.092352,3548315.577368,1],    "boundingVolume": {    "region": [1.889330,0.593634,1.889492,0.593900,0.000000,7.939688]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/8_1378921.b3dm"}}}