FloodNet input data: road networks, elevation, and flood inundation for Metro Manila, Cebu, and Davao

Input data bundle for FloodNet, a percolation-based study of urban road network resilience to flood-induced infrastructure degradation across three Philippine metropolitan areas: Metro Manila (NCR), Metro Cebu, and Metro Davao. The archive contains every raw input needed to reproduce the FloodNet pipeline end-to-end: OpenStreetMap road networks (raw and enriched), SRTM 30 m elevation rasters, flood inundation polygons at 5-, 25-, and 100-year return periods, and administrative boundary shapefiles. Each subdirectory includes a metadata.md file documenting provenance, coordinate system, schema, coverage, and known issues. Contents (data/) network/ — philippines.pbf (full Geofabrik OSM snapshot, 2026-03-27) and per-metro enriched GeoPackages (ncr.gpkg, cebu.gpkg, davao.gpkg) with drivable road edges annotated with length, base speed, node elevation, flood-eligibility flags per return period, and city labels. elevation/ — Per-metro SRTM GL1 GeoTIFFs (ncr.tif, cebu.tif, davao.tif) clipped to metro boundaries. flood/ — Project NOAH flood hazard polygons at 5-, 25-, and 100-year return periods, pre-dissolved into one MultiPolygon per hazard class (low / medium / high, keyed on the Var attribute). Hazard levels combine depth and velocity via Flo-2D GDS Pro routing over LiDAR topography. boundaries/ — PSA/NAMRIA ADM3 (city/municipality) shapefiles for the 17 LGUs of NCR, 13 LGUs of Metro Cebu, and 10 retained LGUs of Metro Davao. Metro area scope NCR — 17 cities (MMDA definition, ADM1_PCODE=PH13). Metro Cebu — 13 LGUs per MCDCB (7 cities, 6 municipalities). Metro Davao — 10 LGUs retained from the 14-LGU statutory definition (RA 11708). Maco, Malita, Santa Maria, and Island Garden City of Samal are excluded due to missing flood data or network disconnection; see data/flood/metadata.md for the full justification. Sources and licensing Road networks: Geofabrik Philippines OSM extract (ODbL-1.0, © OpenStreetMap contributors). Elevation: NASA SRTM GL1 30 m (public domain). Flood hazard: Project NOAH (University of the Philippines), Flo-2D simulations driven by PAGASA rainfall records (ODbL-1.0). Boundaries: PSA / NAMRIA Philippine administrative boundaries (2023-11-06 release). Usage This bundle is the input side of the FloodNet repository. The accompanying code, methodology, and processing pipeline are hosted on GitHub (see the Related identifiers field). To reproduce analyses, unpack this archive at the repository root so the directory layout becomes floodnet/data/{network,elevation,flood,boundaries}/..., or use the provided scripts/download_data.py, which pulls this record by ID and extracts it automatically. Known issues Flood shapefiles contain invalid polygons (is_valid=False); make_valid() is applied by the extraction pipeline, not at source. The Cebu and Davao 100-year flood extents cover areas well beyond their metro boundaries; clipping is deferred to the pipeline. Davao Occidental 5- and 25-year hazard data and all Davao de Oro hazard data are unavailable in the Project NOAH archive, which motivates the Metro Davao LGU exclusions noted above. Full per-layer provenance, schemas, and statistics are included in the metadata.md files inside each subdirectory.