{"asset": {        "version": "0.0",        "gltfUpAxis": "Y"    },    "geometricError":100.000000,"root": {        "transform": [-0.950846,-0.309665,0.000000,0.000000,0.172952,-0.531059,0.829496,0.000000,-0.256326,0.787064,0.561094,0.000000,-1636608.533365,5025302.940702,3558529.376185,1],    "boundingVolume": {    "region": [1.885565,0.595597,1.885710,0.595817,0.000000,8.801387]},"geometricError": 100.000000,        "refine": "REPLACE",        "content": {        "uri": "./tile/4/13/12_1421734.b3dm"}}}