{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949091,-0.315001,0.000000,0.000000,0.116144,-0.349939,0.929545,0.000000,-0.292539,0.881413,0.370853,0.000000,-1866714.239650,5624361.399209,2350602.144733,1],    "boundingVolume": {    "region": [1.891200,0.379870,1.891309,0.379986,0.000000,68.927894]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/21_831.b3dm"}}}