{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949091,-0.315001,0.000000,0.000000,0.116146,-0.349947,0.929541,0.000000,-0.292538,0.881410,0.370862,0.000000,-1866704.015082,5624341.652784,2350657.141009,1],    "boundingVolume": {    "region": [1.891200,0.379880,1.891308,0.379995,0.000000,70.386220]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/21_973.b3dm"}}}