{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949081,-0.315033,0.000000,0.000000,0.116158,-0.349941,0.929542,0.000000,-0.292568,0.881400,0.370860,0.000000,-1866898.552421,5624282.902375,2350643.309606,1],    "boundingVolume": {    "region": [1.891234,0.379877,1.891342,0.379992,0.000000,68.927894]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/21_931.b3dm"}}}