{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950351,-0.311179,0.000000,0.000000,0.173793,-0.530770,0.829505,0.000000,-0.257582,0.786664,0.561081,0.000000,-1644624.777829,5022744.789061,3558445.811134,1],    "boundingVolume": {    "region": [1.887180,0.595633,1.887279,0.595749,0.000000,8.722763]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/6/12_1428527.b3dm"}}}