https://jin-igarashi.me/en/tags/sveltekit/SvelteKitWowchemy (https://wowchemy.com)en-us©Jin IGARASHI 2026Wed, 01 Dec 2021 00:00:00 +0900https://jin-igarashi.me/media/icon_hua67609e7cec176748a23eb15cc956f1a_21755_512x512_fill_lanczos_center_2.pnghttps://jin-igarashi.me/en/tags/sveltekit/https://jin-igarashi.me/en/project/202112-undp-geohub/Wed, 01 Dec 2021 00:00:00 +0900https://jin-igarashi.me/en/project/202112-undp-geohub/<p><strong>Period:</strong> December 2021 – August 2025</p> <p><strong>Organization:</strong> United Nations Development Programme (UNDP), SDG Integration Team, Bureau for Policy and Programme Support</p> <p><strong>Role:</strong> GIS Consultant → Full Stack GIS Developer</p> <p><strong>Links:</strong> <a href="https://geohub.data.undp.org" target="_blank" rel="noopener">GeoHub</a> · <a href="https://github.com/UNDP-Data/geohub" target="_blank" rel="noopener">GitHub (UNDP-Data/geohub)</a></p> <h2 id="background">Background</h2> <p>UNDP has developed a corporate data strategy to accelerate its transformation into a data-driven organization, and geospatial data plays an important role in it. However, the large-scale adoption of geospatial data had been obstructed by data silos across country offices, lack of interoperability, and limited infrastructure and know-how. GeoHub was developed as a part of the Data Futures Exchange (DFx) to solve these issues.</p> <h2 id="what-is-geohub">What is GeoHub?</h2> <p>GeoHub is a centralized ecosystem of geospatial data and services to support development work. It allows users without geospatial skills — UNDP staff and policymakers — to:</p> <ul> <li>search, visualize and download a wide array of datasets, including satellite imagery and spatio-temporal model data</li> <li>upload their own datasets through a data upload pipeline</li> <li>compute dynamic statistics and run raster analytics</li> <li>create maps and share them with the community easily</li> </ul> <h2 id="architecture">Architecture</h2> <ul> <li><strong>Frontend:</strong> SvelteKit and MapLibre GL JS web applications</li> <li><strong>Backend:</strong> PostgreSQL/PostGIS, titiler, pg_tileserv and other FOSS4G software deployed on Azure Kubernetes Service (AKS)</li> <li><strong>Cloud:</strong> Azure App Service, Blob Storage, PubSub</li> <li><strong>Data:</strong> Cloud Optimized GeoTIFF, vector tiles and STAC catalogues</li> <li>All source code is published on GitHub under an open-source license</li> </ul> <h2 id="main-features-i-developed">Main features I developed</h2> <ul> <li>Landing page to direct users to each part of GeoHub</li> <li>Social login (GitHub authentication and UN B2C authentication)</li> <li>Data upload pipeline</li> <li>User permission management for datasets and maps</li> <li>UI/UX improvements for data visualization with MapLibre</li> <li>Raster analytical features (titiler algorithms)</li> <li>Static image API to generate static map images from a saved MapLibre style</li> </ul> <h2 id="related-talks">Related talks</h2> <ul> <li><a href="../../talk/20230629_foss4g2023_undpgeohub/">FOSS4G 2023 Prizren: UNDP&rsquo;s one stop shop for cloud based geospatial data visualisation and analytical tool</a></li> <li><a href="../../talk/20230628_foss4g2023_svelte/">FOSS4G 2023 Prizren: Development of maplibre applications in sveltekit</a></li> <li><a href="../../talk/20240705_foss4g2024/">FOSS4G Europe 2024 Tartu: Leave no one behind - UNDP GeoHub</a></li> </ul> <p>See also <a href="../202411-undp-rapida/">RAPIDA</a>, a crisis assessment tool integrated with GeoHub.</p> <h2 id="skills">Skills</h2> <p>MapLibre, Mapbox, Svelte/SvelteKit, Node.js (JavaScript/TypeScript), Python, PostgreSQL/PostGIS, titiler, pg_tileserv, STAC, Azure (AKS, App Service, Blob Storage, PubSub)</p>