{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.899287,-0.437358,0.000000,0.000000,0.283032,-0.581966,0.762370,0.000000,-0.332489,0.683657,0.649665,0.000000,-2123660.113099,4366629.859187,4121740.819125,1],    "boundingVolume": {    "region": [2.023368,0.707089,2.023542,0.707198,0.000000,14.281193]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_1800803.b3dm"}}}