{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949123,-0.314905,0.000000,0.000000,0.116087,-0.349887,0.929571,0.000000,-0.292458,0.881468,0.370786,0.000000,-1866196.637123,5624712.132199,2350176.730214,1],    "boundingVolume": {    "region": [1.891099,0.379798,1.891207,0.379913,0.000000,69.067500]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/20_77146.b3dm"}}}