add network_viewt/korea_final (official View-T road network)

add network_viewt/korea_r1 (official View-T road network)

add network_viewt/seoul_final_official (official View-T road network)

add network_viewt/jeju_r1 (official View-T road network)

add network_viewt/seoul_r1_official (official View-T road network)

Add ULTRA artifact ultra/seoul/walk/vertices.parquet

Add ULTRA artifact ultra/seoul/walk/stop_mapping.parquet

Add ULTRA artifact ultra/seoul/walk/shortcuts.parquet

Add ULTRA artifact ultra/seoul/walk/meta.json

Add ULTRA artifact ultra/seoul/walk/ch_order.parquet

Add ULTRA artifact ultra/seoul/walk/ch_forward.parquet

Add ULTRA artifact ultra/seoul/walk/ch_backward.parquet

Add ULTRA artifact ultra/seoul/pm/vertices.parquet

Add ULTRA artifact ultra/seoul/pm/stop_mapping.parquet

Add ULTRA artifact ultra/seoul/pm/shortcuts.parquet

Add ULTRA artifact ultra/seoul/pm/meta.json

Add ULTRA artifact ultra/seoul/pm/ch_order.parquet

Add ULTRA artifact ultra/seoul/pm/ch_forward.parquet

Add ULTRA artifact ultra/seoul/pm/ch_backward.parquet

Upload examples/korea/edge_index.pkl with huggingface_hub

Upload examples/korea/road_graph_edges.parquet with huggingface_hub

Upload examples/korea/road_graph_nodes.parquet with huggingface_hub

Upload examples/korea/boundary.geojson with huggingface_hub

refactor: drop deprecated v3 osmnx root files + network_v4/ + seoul_v4_seg duplicates (kept under legacy_osmnx/ where applicable)

refactor: move 16 v3 osmnx region files to legacy_osmnx/ (rename to road_graph_*)

feat: add nationwide korea road-graph (9.08M nodes / 9.59M edges, every-vertex split, KTDB speeds)

feat: add 17 Sido region road-graph slices (KTDB speeds, every-vertex split)

feat: add Seoul slice nodes from v4-dense graph (328K nodes)

feat: add Seoul slice from v4-dense graph (375K edges, every-vertex; sim 100% vs osmnx 86.7%)

feat: add vectorized segment-split v3 nodes (9.08M nodes)

feat: add vectorized segment-split v3 (9.59M edges, every-vertex graph nodes; Seoul sim service rate 75.3% -> 100%)

Add v4 segment-level nodes parquet

Add v4 segment-level parquets (2.27M edges, 1.77M nodes) for routing

Add v4 national way-level dataset (1.15M ways, 16 KTDB speed slots)

v3.3: directional matching + robust median + spatial KNN fallback

Add v3: 16 regions × (nodes + edges), 8 time slots × weekday/weekend

initial commit