{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950447,-0.310887,0.000000,0.000000,0.114382,-0.349691,0.929856,0.000000,-0.288816,0.882971,0.370064,0.000000,-1842951.528113,5634294.001538,2345594.361743,1],    "boundingVolume": {    "region": [1.886848,0.379039,1.886997,0.379117,0.000000,28.799661]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/21/15_4186.b3dm"}}}