{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950425,-0.310954,0.000000,0.000000,0.114421,-0.349727,0.929838,0.000000,-0.288872,0.882933,0.370110,0.000000,-1843313.541389,5634053.017806,2345886.756912,1],    "boundingVolume": {    "region": [1.886919,0.379088,1.887067,0.379167,0.000000,13.550345]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/16_4457.b3dm"}}}