日本語のREADMEはこちらです: README.ja.md

This repository automatically downloads, archives, and visualizes tide level data from the Japan Meteorological Agency (JMA). The data is updated hourly via a GitHub Action.

• Live Demo: 気象庁 潮位データ 2024-01-01/02 （日本海側5府県）

• Automatic Data Fetching: A GitHub Actions workflow (see .github/workflows/scheduled-update.yml) runs the download.js Deno script on an hourly schedule. This script fetches the latest tide data for all registered stations.
• Data Storage: The raw JSON data from JMA is archived in the data/ directory, organized by year/month and station code. The file structure is data/YYYYMM/STATION_ID/tide_obs_YYYYMMDD_STATION_ID.json.
• Visualization: The index.html page uses ApexCharts.js to create an interactive line chart of the downloaded data.

• Source: 気象庁｜潮位観測情報 (JMA Tide Observation Information)
• Stations: A list of observation stations is available in stations.csv.

This project uses Deno as its JavaScript runtime.

To fetch the latest data for today and yesterday, run the main download script:

deno run -A download.js

You can use download-cmd.js to fetch data for a specific day or a single station.

Download data for all stations on a specific day (YYYYMMDD):

deno run -A download-cmd.js 20240101

Download data for a specific station on a specific day:

deno run -A download-cmd.js 20240101 145602

• Data: 気象庁 (Japan Meteorological Agency)
• Application: Code for Fukui