{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949105,-0.314960,0.000000,0.000000,0.116123,-0.349927,0.929552,0.000000,-0.292502,0.881432,0.370836,0.000000,-1866479.832037,5624486.073200,2350490.719724,1],    "boundingVolume": {    "region": [1.891156,0.379851,1.891265,0.379967,0.000000,68.927894]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/21_515.b3dm"}}}