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2025-08-06 Heavy Rain in Kyushu Island, Japan | 令和7年8月6日からの低気圧と前線による大雨 #9
Heavy Rain in Kyushu Island, 2025 Building and Road Mapping. Kirishima, Kagoshima, Japan
九州豪雨 2025 建物/道路マッピング 鹿児島県霧島市
2. Description
Short Description/概略 EN
Starting **August 6, 2025**, a stationary linear rain band brought prolonged heavy rainfall to the **Kyushu region of Japan**, causing **flooding and landslides** in multiple areas.
*(August 2025)*
We have extracted the areas expected to be most severely affected using the [bosaiXView Estimated Flood Zones](https://bosai.maps.arcgis.com/apps/instant/portfolio/index.html?appid=1198beeef59a46fab8e327d3624e7b1b), and launched this **task project** in collaboration with various support organizations.
The goal is to enhance **OpenStreetMap building and minor road data**, especially in regions where OSM data is currently insufficient, focusing on the areas where these organizations are active.
If you have time, **we would greatly appreciate your support**.
### Background
Starting on **August 6, 2025**, a stationary **linear rainband** brought **prolonged heavy rainfall** to the **Kyushu region of Japan**, resulting in **flooding** and **landslides** across multiple locations.
### Project Purpose
To support **recovery and reconstruction efforts**, this task project was launched with the goal of:
- Enhancing **OpenStreetMap (OSM)** data for disaster-affected areas
- Collaborating with digital mapping initiatives such as the **Geospatial Information Authority of Japan’s GSI Maps**
- Supporting **disaster relief volunteers** and **aid organizations** working on-site
- Improving **building and minor road data** used in various tools for **base maps** and **thematic maps**
Road target is limited to **unmapped minor roads, such as residential, service, and track.** Highways are excluded from this task.
### 📍 Priority Areas
Regions expected to have suffered the most damage were extracted using the
[bosaiXView Estimated Flood Zones](https://bosai.maps.arcgis.com/apps/instant/portfolio/index.html?appid=1198beeef59a46fab8e327d3624e7b1b).
### Future-Oriented Mapping
This is not a crisis mapping project focused on emergency response like search and rescue.
Instead, it is a **forward-looking initiative** aimed at:
- Supporting **ongoing recovery and reconstruction**
- Strengthening **disaster preparedness and mitigation**
- Enriching OSM data in regions prone to **future natural disasters**
### Call for Participation
We sincerely appreciate your cooperation in helping build a more resilient future through improved mapping.
## 🗺️ Guidelines for Mapping
- Please use the default **Bing** imagery as the background layer. Unfortunately, the [GSI Seamless Photo Layer](https://maps.gsi.go.jp/development/ichiran.html#seamlessphoto) for this area is based on very old aerial photography, so we recommend using the most up-to-date imagery available.
- If Bing aerial imagery is difficult to use, you may switch to **ESRI World Imagery**.
- If the background imagery appears misaligned with existing map features, you may need to **offset the imagery** to match the correct position. As a reference, the GSI Seamless Photo Layer can be helpful for alignment.
- **Map only buildings and roads.** Road target is limited to unmapped **minor roads, such as residential, service, and track.**
- Please map **individual buildings**, not building groups.
- Major roads are already mapped, so please focus on adding **more detailed roads**. Highways are excluded from this task.
- If you are not a local resident or an experienced mapper, please be careful not to alter existing map data unnecessarily.
---
## 🧭 How to Use the Task Manager
[Watch the tutorial video](https://youtu.be/lSLe6rjtgi0)
## 🛠️ How to Adjust Background Imagery in iD Editor

Activity
mapconcierge commentedon Aug 12, 2025
Tasking Manager プロジェクト立ち上げ用の作文作業テンプレート(作業中)
1. Title
2. Description
Short Description/概略 EN
Short Description/概略 JA
Description EN
Description JA
3. INSTRUCTION
Detailed Instruction EN
Detailed Instruction JA
mapconcierge commentedon Aug 12, 2025
被害状況のまとめ
地理院地図と浸水想定エリアの比較
AyameO commentedon Aug 12, 2025
優先順位1:
鹿児島県霧島市: 建物・道路←古橋さんが作成してくれた1つ目のHOTのプロジェクトを下書きに作成しました。
以下、内容のクロスチェックお願いします。
まだ災害名は命名されてないので、暫定で「九州豪雨」としています。
九州豪雨 2025 建物/道路マッピング 鹿児島県霧島市
AyameO commentedon Aug 13, 2025
優先順位3:鹿児島県姶良市: 建物・道路
3つ目のHOTのプロジェクトを下書きに作成しました。
以下、内容のクロスチェックと動作確認お願いします。
まだ災害名は命名されてないので、暫定で「九州豪雨」としています。
九州豪雨 2025 建物/道路マッピング 鹿児島県姶良市
AyameO commentedon Aug 16, 2025
優先順位4:熊本県熊本市: 建物・道路
4つ目のHOTのプロジェクトを下書きに作成しました。
以下、内容のクロスチェックと動作確認お願いします。
まだ災害名は命名されてないので、暫定で「九州豪雨」としています。
九州豪雨 2025 建物/道路マッピング 熊本県熊本市