{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950335,-0.311230,0.000000,0.000000,0.173897,-0.530992,0.829342,0.000000,-0.257573,0.786493,0.561324,0.000000,-1644569.369740,5021661.412793,3559989.696984,1],    "boundingVolume": {    "region": [1.887233,0.595926,1.887333,0.596043,0.000000,8.682140]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/7/15_1430385.b3dm"}}}