{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.899280,-0.437374,0.000000,0.000000,0.283040,-0.581954,0.762377,0.000000,-0.332504,0.683656,0.649658,0.000000,-2123755.647086,4366627.234823,4121694.686617,1],    "boundingVolume": {    "region": [2.023386,0.707080,2.023560,0.707189,0.000000,14.281193]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_1800757.b3dm"}}}