{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950757,-0.309937,0.000000,0.000000,0.173242,-0.531433,0.829196,0.000000,-0.256457,0.786703,0.561540,0.000000,-1637449.352476,5023006.464206,3561364.638513,1],    "boundingVolume": {    "region": [1.885850,0.596136,1.885996,0.596356,0.000000,8.803725]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/14_1423508.b3dm"}}}