# What's This Cloud

> An independent educational field guide for learning cloud identification and classification, created by Greg Goodson. The site combines original cloud illustrations, photographs, practical identification guidance, lessons, a free ebook, and cloud-classification posters.

## Canonical website

- [What's This Cloud](https://whatsthiscloud.com)

## Core learning resources

- [Cloud identification guide](https://whatsthiscloud.com/cloud-identification): A practical introduction to identifying and classifying clouds.
- [The ten cloud types](https://whatsthiscloud.com/cloud-types): The ten cloud genera organized by altitude, with photographs and illustrations.
- [Cloud taxonomy and site index](https://whatsthiscloud.com/cloud-index): Cloud types, species, varieties, supplementary features, accessories, lessons, and other clouds.
- [Cloud classification lessons](https://whatsthiscloud.com/lessons): Step-by-step classification practice using real cloud photographs.
- [Frequently asked questions](https://whatsthiscloud.com/faqs): Background and answers about the project and cloud identification.

## Free ebook

- [Cloud types ebook](https://whatsthiscloud.com/ebook): A 136-page introductory visual guide delivered by email.

## Shop

- [Cloud poster shop](https://whatsthiscloud.com/shop): The complete poster collection.
- [Cloud classification poster](https://whatsthiscloud.com/shop/cloud-classification-poster)
- [Cloud identification poster](https://whatsthiscloud.com/shop/cloud-identification-poster)
- [Cloud types poster](https://whatsthiscloud.com/shop/cloud-types-poster)
- [Three-poster bundle](https://whatsthiscloud.com/shop/cloud-poster-bundle)

## About and policies

- [About What's This Cloud](https://whatsthiscloud.com/about-us)
- [Contact](https://whatsthiscloud.com/contact-us)
- [Privacy policy](https://whatsthiscloud.com/privacy-policy)
- [Terms](https://whatsthiscloud.com/terms)
- [Shipping and returns](https://whatsthiscloud.com/shipping-returns)
- [Accessibility](https://whatsthiscloud.com/accessibility)

## Machine-readable discovery

- [XML sitemap](https://whatsthiscloud.com/sitemap.xml)
- [Image sitemap](https://whatsthiscloud.com/image-sitemap.xml)

The public educational content and original illustrations are copyrighted by What's This Cloud. Use and citation are subject to the site's terms.