Personal GIS

Public geographic data storage for Birudo's personal GIS exploration project.

Bucket: https://huggingface.co/buckets/Birudo/personal-gis CLI URI: hf://buckets/Birudo/personal-gis/

Publication rules

• Publish only datasets whose redistribution terms have been verified. Public availability alone is not permission to redistribute.
• Never upload personal POIs, routes, credentials, or the entire project directory by default.
• Each published dataset must include source URL, attribution, license, product version, observation year, units, CRS, resolution, processing steps, limitations, and a SHA-256 checksum.
• Use explicit versioned paths such as population/worldpop/2020/v1/. Buckets have no Git version history; do not overwrite published versions.
• Prefer losslessly compressed Cloud Optimized GeoTIFFs (COGs) for raster data. Retain vector features in suitable vector formats, not rasterized merely for storage.
• Treat raster overviews as display aids, not authoritative population totals.
• Verify uploaded files by downloading or reading them back before removing any local copy. Local deletion is a separate, explicit operation.

Published data

Laos population density, 2020 (v1)

• File: population/worldpop/2020/v1/lao_population_density_2020_v1.tif
• Source: WorldPop Global_2000_2020_1km_UNadj, 2020 Laos; https://doi.org/10.5258/SOTON/WP00685
• Original raster: https://data.worldpop.org/GIS/Population/Global_2000_2020_1km_UNadj/2020/LAO/lao_ppp_2020_1km_Aggregated_UNadj.tif
• Source license recorded in project provenance: CC BY 4.0; attribution to WorldPop, University of Southampton. This is a derived product, not an official WorldPop density release.
• Units: people/km². CRS: EPSG:4326. Grid spacing: approximately 30 arc-seconds; 905 × 1031 cells. NoData: -99999.
• Derivation: UN-adjusted modelled persons per cell divided by WGS84 ellipsoidal full-cell area in km². Converted to lossless DEFLATE COG; two average overviews for display. Full-resolution values unchanged in COG conversion.
• Limitations: modelled estimates, not household observations; full-cell rather than land-only density. Do not sum density cells or use overview values for population totals.
• SHA-256: 3c8b429c1939d36fbd3fb37cdac4b4728b00d9711228c037061083444fd07819
• Size: 1,350,777 bytes.
• Public URL: https://huggingface.co/buckets/Birudo/personal-gis/resolve/population%2Fworldpop%2F2020%2Fv1%2Flao_population_density_2020_v1.tif

Upload was downloaded back and SHA-256 matched. Anonymous HTTP range request returned 206; GDAL successfully opened the remote COG through /vsicurl/.

Global population counts and density, 2020 (v1)

Source: WorldPop Global_2000_2020_1km_UNadj, unconstrained global mosaic. Attribution: WorldPop (University of Southampton, University of Louisville, Université de Namur) and CIESIN, Columbia University. CC BY 4.0: https://creativecommons.org/licenses/by/4.0/ . Official licensing statement: https://hub.worldpop.org/geodata/summary?id=24777 (that catalogue page links the non-UN-adjusted variant; our exact UN-adjusted source is below).

Original source: https://data.worldpop.org/GIS/Population/Global_2000_2020_1km_UNadj/2020/0_Mosaicked/global_2020_1km_UNadj_uncounstrained.tif

• Counts: global_population_count_2020_v1.tif, 809,084,729 bytes. SHA-256 57d46f49308304d19e70fcd492b7a4ea65c5eecd982c0e7d593392a39b5fa020.
• Derived density: global_population_density_2020_v1.tif, 809,245,137 bytes. SHA-256 f7d05c41d3cee4a133cf70d9c358697f43aaf2fcc43aa55b61f08b233bb590f4.
• Full provenance and validation manifest.

EPSG:4326, 43,199 × 16,755 cells, approximately 30 arc-seconds, Float32, NoData -99999. Source extends approximately 56°S–83.63°N; Antarctica is absent. Modelled population, not household observations. Counts are people/cell; density is people/km² using full-cell WGS84 ellipsoidal area. Density arithmetic rounds to Float32; subsequent DEFLATE COG storage preserves stored values exactly. Seven average overviews per file are for display, not population totals.

Both outputs passed full blockwise pixel/mask equality against their pre-COG inputs, structural COG validation, full upload/download SHA-256 checks, anonymous HTTP 206 byte-range checks, and local-vs-cloud pixel comparisons inside QGIS for Bangkok, Tokyo, New York, Lagos, São Paulo and an ocean window.