{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950869,-0.309594,0.000000,0.000000,0.172927,-0.531118,0.829463,0.000000,-0.256257,0.787052,0.561143,0.000000,-1636164.667614,5025226.867098,3558838.817649,1],    "boundingVolume": {    "region": [1.885489,0.595656,1.885635,0.595876,0.000000,8.789350]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/12/12_1421860.b3dm"}}}