{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950756,-0.309940,0.000000,0.000000,0.173124,-0.531066,0.829456,0.000000,-0.256541,0.786952,0.561154,0.000000,-1637982.241540,5024584.337497,3558909.473109,1],    "boundingVolume": {    "region": [1.885854,0.595669,1.885999,0.595889,0.000000,8.813958]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/15/12_1421875.b3dm"}}}