{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949128,-0.314892,0.000000,0.000000,0.116107,-0.349962,0.929541,0.000000,-0.292436,0.881443,0.370864,0.000000,-1866055.339468,5624552.391361,2350667.868654,1],    "boundingVolume": {    "region": [1.891085,0.379881,1.891193,0.379997,0.000000,72.367680]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/15/21_996.b3dm"}}}