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| 1 | +<!--lint disable no-html--> |
1 | 2 | <img src="https://github.com/radiantearth/stac-site/raw/master/images/logo/stac-030-long.png" alt="stac-logo" width="700"/>
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2 | 3 |
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3 | 4 | [](https://circleci.com/gh/radiantearth/stac-spec)
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@@ -83,23 +84,24 @@ that enable clients to search for Item objects that match their filtering criter
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83 | 84 | The **Item**, **Catalog**, **Collection**, and **STAC API** specifications are intended to be
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84 | 85 | used together, but are designed so each piece is small, self-contained, and reusable in other contexts.
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85 | 86 |
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86 |
| -* **[Overview](overview.md)** describes the three core object type specifications and how they relate to one another. |
87 |
| -* **[Item Specification](item-spec/)** defines a STAC **Item**, which is a [GeoJSON](http://geojson.org) **Feature** |
88 |
| -with additional fields ("foreign members") for attributes like time and links to related entities and assets |
89 |
| -(including thumbnails). This is the core entity that describes the data to be discovered. |
90 |
| -* **[Catalog Specification](catalog-spec/)** specifies a structure to link various STAC Items together to be crawled or browsed. It is a |
91 |
| -simple, flexible JSON file of links to Items, Catalogs or Collections that can be used in a variety of ways. |
92 |
| -* **[Collection Specification](collection-spec/)** provides additional information about a spatio-temporal collection of data. |
93 |
| -In the context of STAC it is most likely a related group of STAC Items that is made available by a data provider. |
94 |
| -It includes things like the spatial and temporal extent of the data, the license, keywords, etc. |
95 |
| -It enables discovery at a higher level than individual Item objects, providing a simple way to describe sets of data. |
96 |
| -* **[Examples](examples/):** The *[examples/](examples/)* folder contains examples for all three specifications, linked together to form two |
97 |
| -complete examples. Each spec and extension links in to highlight particular files that demonstrate key concepts. |
98 |
| -* **[Extensions](extensions/README.md)** describe how STAC can use extensions that extend the functionality of the core spec or |
99 |
| -add fields for specific domains. Extensions can be published anywhere, although the preferred location for public extensions is in the [GitHub `stac-extensions` organization](https://github.com/stac-extensions). |
100 |
| -* **Additional documents:** The supporting documents include a complementary [best practices](best-practices.md) |
101 |
| -document, and information on contributing (links in the next section). We also maintain a [changelog](CHANGELOG.md) of |
102 |
| -what was modified in each version. |
| 87 | +- **[Overview](overview.md)** describes the three core object type specifications and how they relate to one another. |
| 88 | +- **[Item Specification](item-spec/)** defines a STAC **Item**, which is a [GeoJSON](http://geojson.org) **Feature** |
| 89 | + with additional fields ("foreign members") for attributes like time and links to related entities and assets |
| 90 | + (including thumbnails). This is the core entity that describes the data to be discovered. |
| 91 | +- **[Catalog Specification](catalog-spec/)** specifies a structure to link various STAC Items together to be crawled or browsed. It is a |
| 92 | + simple, flexible JSON file of links to Items, Catalogs or Collections that can be used in a variety of ways. |
| 93 | +- **[Collection Specification](collection-spec/)** provides additional information about a spatio-temporal collection of data. |
| 94 | + In the context of STAC it is most likely a related group of STAC Items that is made available by a data provider. |
| 95 | + It includes things like the spatial and temporal extent of the data, the license, keywords, etc. |
| 96 | + It enables discovery at a higher level than individual Item objects, providing a simple way to describe sets of data. |
| 97 | +- **[Examples](examples/):** The *[examples/](examples/)* folder contains examples for all three specifications, linked together to form two |
| 98 | + complete examples. Each spec and extension links in to highlight particular files that demonstrate key concepts. |
| 99 | +- **[Extensions](extensions/README.md)** describe how STAC can use extensions that extend the functionality of the core spec or |
| 100 | + add fields for specific domains. Extensions can be published anywhere, |
| 101 | + although the preferred location for public extensions is in the [GitHub `stac-extensions` organization](https://github.com/stac-extensions). |
| 102 | +- **Additional documents:** The supporting documents include a complementary [best practices](best-practices.md) |
| 103 | + document, and information on contributing (links in the next section). We also maintain a [changelog](CHANGELOG.md) of |
| 104 | + what was modified in each version. |
103 | 105 |
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104 | 106 | ## Contributing
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105 | 107 |
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