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Describe ItemCollection and CollectionCollection #1290

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Jul 12, 2024
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Describe ItemCollection and CollectionCollection #1290

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344a067
Dewscribe ItemCollection and CollectionCollection
emmanuelmathot Jun 27, 2024
a3757ea
moved to READMEs
emmanuelmathot Jul 4, 2024
dd6c2c0
Update item-spec/README.md
emmanuelmathot Jul 4, 2024
c2ac766
Update collection-spec/README.md
emmanuelmathot Jul 8, 2024
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4 changes: 4 additions & 0 deletions collection-spec/README.md
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Expand Up @@ -44,3 +44,7 @@ a collection and be able to adapt it to most any data model.

Implementors are encouraged to do what makes sense for them, and to check out the [examples](../examples/) and
[other implementations](https://stacindex.org/catalogs) for current best practices.
> \[!NOTE]
> In cases where a set of Collections is grouped together (e.g. for providing search results),
> the [CollectionCollection](https://github.com/radiantearth/stac-api-spec/blob/main/fragments/collectioncollection/README.md)
> object has been defined in the STAC API specification.
9 changes: 9 additions & 0 deletions item-spec/README.md
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Expand Up @@ -21,3 +21,12 @@ schemas validate additional fields defined in *[Common Metadata](common-metadata

**Common Metadata:** A set of commonly-used fields for STAC Items is listed in
*[common-metadata.md](common-metadata.md)*.

> \[!NOTE]
> In cases where a set of Items is grouped together (e.g. for providing search results),
> the [ItemCollection](https://github.com/radiantearth/stac-api-spec/blob/main/fragments/itemcollection/README.md)
> object has been defined in the STAC API specification.
>
> Similarly to the relationship between a GeoJSON Feature and a STAC Item,
> a STAC ItemCollection should be a valid GeoJSON [FeatureCollection](https://tools.ietf.org/html/rfc7946#section-3.3)
> to allow interoperability with existing tools that support GeoJSON.
2 changes: 1 addition & 1 deletion item-spec/item-spec.md
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Expand Up @@ -313,7 +313,7 @@ that talks about common use cases of additional fields for assets.
## Media Type for STAC Item

A STAC Item is a GeoJSON file ([RFC 7946](https://tools.ietf.org/html/rfc7946)), and thus should use the
[`application/geo+json`](https://tools.ietf.org/html/rfc7946#section-12) as the [Media Type](https://en.wikipedia.org/wiki/Media_type)
[`application/geo+json`](https://tools.ietf.org/html/rfc7946#section-12) as the [Media Type](https://en.wikipedia.org/wiki/Media_type)
(previously known as the MIME Type).

## Extensions
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