{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.952258,-0.305296,0.000000,0.000000,0.169243,-0.527892,0.832278,0.000000,-0.253565,0.790901,0.556938,0.000000,-1618951.561643,5049723.121114,3532115.928043,1],    "boundingVolume": {    "region": [1.880991,0.590651,1.881099,0.590738,0.000000,8.319746]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/6/20/31_1321777.b3dm"}}}