{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949593,-0.313486,0.000000,0.000000,0.173709,-0.526190,0.832436,0.000000,-0.260417,0.788839,0.556701,0.000000,-1662698.470092,5036550.033259,3530611.822656,1],    "boundingVolume": {    "region": [1.889598,0.590347,1.889718,0.590472,0.000000,7.187754]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_1338746.b3dm"}}}