{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949084,-0.315022,0.000000,0.000000,0.115995,-0.349464,0.929742,0.000000,-0.292621,0.881596,0.370354,0.000000,-1867235.259442,5625521.489122,2347431.467956,1],    "boundingVolume": {    "region": [1.891222,0.379332,1.891330,0.379447,0.000000,61.800895]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/16_6921.b3dm"}}}