{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.952382,-0.304906,0.000000,0.000000,0.168818,-0.527307,0.832735,0.000000,-0.253382,0.791443,0.556251,0.000000,-1617778.919301,5053168.907689,3527751.930821,1],    "boundingVolume": {    "region": [1.880583,0.589824,1.880690,0.589912,0.000000,6.367457]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/6/16/21_1322820.b3dm"}}}