{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950450,-0.310876,0.000000,0.000000,0.114115,-0.348887,0.930191,0.000000,-0.288911,0.883296,0.369213,0.000000,-1843556.438184,5636356.984560,2340192.796125,1],    "boundingVolume": {    "region": [1.886837,0.378122,1.886985,0.378201,0.000000,4.958898]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/3_8540.b3dm"}}}