{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.899266,-0.437402,0.000000,0.000000,0.283070,-0.581970,0.762353,0.000000,-0.332515,0.683625,0.649685,0.000000,-2123826.288731,4366427.923292,4121868.264339,1],    "boundingVolume": {    "region": [2.023417,0.707116,2.023591,0.707225,0.000000,18.488426]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_1801555.b3dm"}}}