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STAC SpatioTemporal Asset Catalogs

The STAC specification is a common language to describe geospatial information, so it can more easily be worked with, indexed, and discovered.

STAC was created for

Data providers

STAC is a standardized way to expose collections of spatial temporal data. If you are a provider of data about the earth needing to catalog your holdings, STAC is driving a uniform means for indexing assets.

Developers

If you are building infrastructure to host, ingest, or manage collections of spatial data, STAC’s core JSON is the bare minimum needed to describe geospatial assets, and is extensible to customize to your domain.

Data users

Users of spatial temporal data are often burdened with building unique pipelines for each different collection of data they consume. The STAC community has defined this specification to remove this complexity and spur common tooling.

What is STAC

At its core, the SpatioTemporal Asset Catalog (STAC) specification provides a common structure for describing and cataloging spatiotemporal assets.

A spatiotemporal asset is any file that represents information about the earth captured in a certain space and time.

The STAC Specification

The STAC Specification consists of 4 semi-independent specifications. Each can be used alone, but they work best in concert with one another.

STAC Item is the core atomic unit, representing a single spatiotemporal asset as a GeoJSON feature plus datetime and links.

STAC Catalog is a simple, flexible JSON file of links that provides a structure to organize and browse STAC Items. A series of best practices helps make recommendations for creating real world STAC Catalogs.

STAC Collection is an extension of the STAC Catalog with additional information such as the extents, license, keywords, providers, etc that describe STAC Items that fall within the Collection.

STAC API provides a RESTful endpoint that enables search of STAC Items, specified in OpenAPI, following OGC's WFS 3.

More About the Specification

The Vision

The goal is for all providers of spatiotemporal assets (Imagery, SAR, Point Clouds, Data Cubes, Full Motion Video, etc) to expose their data as SpatioTemporal Asset Catalogs (STAC), so that new code doesn't need to be written whenever a new data set or API is released.

More About STAC

Browse the STAC Tutorial Library

Want to learn to interact with STAC data in a project, spin up a STAC API, or make the data you manage more accessible? Browse our library of tutorials and workshops about STAC and its ecosystem.

Browse Tutorials

Getting Started with STAC

Learn about the specification, the options available for applying STAC in a practical way, and the community and resources to help you along the way.

Intro to STAC: an Overview of the Specification

Explore STAC Notebooks

Gain a better understanding of STAC by interacting with these hands-on jupyter notebooks.

Access Sentinel 2 Data from AWS
Reading Landsat Data from Microsoft

Explore STAC datasets

The amount of STAC data being collected and hosted in STAC APIs and static catalogs grows everyday as data providers adopt STAC as the defacto specification for spatiotemporal data. As more datasets are created, our community adds them to stacindex.org to be discovered and explored.

Explore STAC tools & resources

The STAC ecosystem continues to evolve with its ever growing library of tools and resources. More are being listed all the time at stacindex.org to experiment with and use in your next STAC project.

STAC is supported by these incredible organizations

Get Involved

There are a variety of ways to get involved with STAC, from building software, creating new STAC Catalogs, working on the spec, or helping in outreach. We strive to be fully open, collaborative and welcoming community. Learn more on our "Get Involved" page.

Learn How to Help