{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.949104,-0.314962,0.000000,0.000000,0.116123,-0.349925,0.929553,0.000000,-0.292505,0.881433,0.370833,0.000000,-1866496.041814,5624487.312804,2350474.987521,1],    "boundingVolume": {    "region": [1.891159,0.379849,1.891267,0.379964,0.000000,68.927894]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/5/16/21_507.b3dm"}}}