WebGIS | JIN IGARASHI

Narok Water WebGIS

Mon, 01 Sep 2014 00:00:00 +0900

The WebGIS I have developed and maintained for Narok Water since my time as a JICA Volunteer. It visualizes the water distribution network (about 300 km of pipelines), customers and DMAs, and is used daily for asset and Non-Revenue Water management. It started in 2014 with OpenLayers, moved to Leaflet in 2015, and was modernized with open-source vector tiles and MapLibre GL JS.

Tech stack: PostgreSQL/PostGIS, vector tiles, MapLibre GL JS, SvelteKit, GitHub Pages

Nanyuki Water WebGIS

Tue, 01 Sep 2020 00:00:00 +0900

A WebGIS for Nanyuki Water and Sewerage Co., Ltd. in Kenya, built by applying the vector tile approach developed for Narok Water. It shows pipelines with their diameter and material, tanks and other water facilities over satellite imagery, and provides measuring, printing and elevation tools.

Tech stack: PostgreSQL/PostGIS, vector tiles, MapLibre GL JS, SvelteKit

WASAC Rural Water WebGIS

Mon, 01 Jun 2020 00:00:00 +0900

A WebGIS that publishes the nationwide rural water supply data of Rwanda, which was mapped with Rwandan colleagues during the JICA RWASOM project. The PostGIS database is converted to vector tiles hosted on GitHub Pages, together with 10 m terrain RGB tiles and administrative boundaries.

Tech stack: PostgreSQL/PostGIS, QGIS/QField, vector tiles, terrain RGB, MapLibre GL JS, GitHub Pages

UNDP GeoHub

Wed, 01 Dec 2021 00:00:00 +0900

GeoHub is a centralized ecosystem of geospatial data and services at UNDP. Users without geospatial skills can search, visualize and download datasets, upload their own data, run raster analytics and share maps. I developed many of its core features as a Full Stack GIS Developer, including the data upload pipeline, authentication, permission management and map styling UI.

Tech stack: SvelteKit, MapLibre GL JS, PostgreSQL/PostGIS, titiler, pg_tileserv, STAC, Azure

Related: UNDP GeoHub project