{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.952235,-0.305367,0.000000,0.000000,0.169265,-0.527824,0.832317,0.000000,-0.253635,0.790919,0.556880,0.000000,-1619402.309832,5049837.292620,3531748.526693,1],    "boundingVolume": {    "region": [1.881066,0.590581,1.881174,0.590669,0.000000,7.154757]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/6/20/30_1321816.b3dm"}}}