{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.952397,-0.304860,0.000000,0.000000,0.168795,-0.527323,0.832730,0.000000,-0.253341,0.791450,0.556259,0.000000,-1617522.095763,5053216.032391,3527801.858436,1],    "boundingVolume": {    "region": [1.880534,0.589834,1.880642,0.589921,0.000000,8.703694]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/6/15/21_1322812.b3dm"}}}