{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950573,-0.310503,0.000000,0.000000,0.172052,-0.526721,0.832444,0.000000,-0.257941,0.789660,0.556690,0.000000,-1646891.424438,5041793.840688,3530536.695962,1],    "boundingVolume": {    "region": [1.886433,0.590334,1.886603,0.590457,0.000000,7.150127]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/17_1462838.b3dm"}}}