{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950759,-0.309932,0.000000,0.000000,0.173240,-0.531436,0.829195,0.000000,-0.256453,0.786704,0.561542,0.000000,-1637420.490847,5023007.968029,3561375.712769,1],    "boundingVolume": {    "region": [1.885845,0.596138,1.885991,0.596358,0.000000,8.227530]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/14_1338949.b3dm"}}}