{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950546,-0.310585,0.000000,0.000000,0.173328,-0.530472,0.829793,0.000000,-0.257180,0.787100,0.560652,0.000000,-1642059.665656,5025524.845197,3555722.587443,1],    "boundingVolume": {    "region": [1.886513,0.595101,1.886696,0.595247,0.000000,8.805440]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/12/15_1449888.b3dm"}}}