{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950932,-0.309398,0.000000,0.000000,0.113236,-0.348030,0.930620,0.000000,-0.287672,0.884156,0.368121,0.000000,-1835643.110905,5641827.121372,2333268.504909,1],    "boundingVolume": {    "region": [1.885342,0.376983,1.885371,0.376992,0.000000,10.388746]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/20.b3dm"}}}