{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950376,-0.311102,0.000000,0.000000,0.174006,-0.531566,0.828951,0.000000,-0.257345,0.786154,0.561904,0.000000,-1643116.962842,5019503.451297,3563676.910890,1],    "boundingVolume": {    "region": [1.887100,0.596636,1.887198,0.596735,0.000000,8.818804]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/12/7_1399916.b3dm"}}}