{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950740,-0.309989,0.000000,0.000000,0.173180,-0.531145,0.829394,0.000000,-0.256562,0.786879,0.561247,0.000000,-1638116.401865,5024120.335393,3559498.765898,1],    "boundingVolume": {    "region": [1.885905,0.595781,1.886051,0.596001,0.000000,8.813958]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/12_1422120.b3dm"}}}