# Welcome to this Book

This book demonstrates the use of the catalogue interface provided by the ESA MAAP.
It provides examples of typical search requests for Earth Observation {term}`collection`s and {term}`granule`s and the corresponding responses.

The book covers multiple topics including:

- STAC collection and item search interfaces.
- STAC collection and item metadata.

Useful links:

- [Access with STAC Browser](https://radiantearth.github.io/stac-browser/#/external/catalog.maap.eo.esa.int/catalogue/?.language=en)
- [OpenAPI Definition](http://petstore.swagger.io/?url=https://catalog.maap.eo.esa.int/catalogue/api)
- [OpenSearch Description Document](https://catalog.maap.eo.esa.int/catalogue/api?httpAccept=application%2Fopensearchdescription%2Bxml)
- [Viewer Client](https://explorer.maap.eo.esa.int/)