# 21000画像および400km²：長江をマッピング

**URL:** <https://community.pix4d.com/t/21000-400km/9531>\
**Category:** 日本語のPix4D\
**Created:** [October 17, 2019, 5:33am UTC](https://community.pix4d.com/t/21000-400km/9531 "2019-10-17T05:33:47Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Emilio\_Kazuki\_Wakita](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/emilio_kazuki_wakita/32/816_2.png) [@Emilio\_Kazuki\_Wakita](https://community.pix4d.com/u/Emilio_Kazuki_Wakita)\
**Post date:** [October 17, 2019, 5:33am UTC](https://community.pix4d.com/t/21000-400km/9531/1 "2019-10-17T05:33:47Z")

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[ブログ] アジアで最長の川、長江（Yangtze River）は中国、鎮江市のライフラインでもあり、洪水災害の源でもあります。洪水の対策を練るため、地元の自治体がPix4Dmapperとドローンで400km²を超える大きなドローンマップを作成しました。

より詳しく知りたい方は下記ブログをご覧ください！:

![](https://global.discourse-cdn.com/pix4d/original/1X/c54ca96b3b628cb7d9b6a4a6d7d3a816f4b91623.png) [Pix4D](https://www.pix4d.com/blog/large-drone-map-yangtze)

 ![](https://global.discourse-cdn.com/pix4d/original/1X/237d56cc0ef0e8b7d4da00e94b79991946872586.jpeg)

### [400km² and 21,000 images: Mapping the Yangtze River](https://www.pix4d.com/blog/large-drone-map-yangtze)

The Yangtze River is Zhenjiang’s lifeline and a constant threat. To prepare for floods, local authorities made one really big drone map. Read the full use case.

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**Author:** ![teodora.enache](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/teodora.enache/32/5811_2.png) [@teodora.enache](https://community.pix4d.com/u/teodora.enache)\
**Post date:** [October 17, 2019, 2:19pm UTC](https://community.pix4d.com/t/21000-400km/9531/2 "2019-10-17T14:19:11Z")

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Great use case, Emilio!