STAC CARD4L Extensions

• Title: CARD4L (Optical and SAR)
• Field Name Prefix: card4l
• Scope: Item
• Extension Maturity Classification: Pilot
• Owner: @m-mohr

This repository contains two STAC extensions that specifies how to create STAC Items (and Collections) that comply to the CEOS CARD4L product family specifications for either:

• Optical - Surface Reflectance
• Optical - Surface Temperature
• SAR - Normalized Radar Backscatter
• SAR - Polarimetric Radar

There are two STAC extensions, one for Optical and one for SAR:

• Optical
• SAR

Disclaimer

WE ARE WORKING ON A SUCCESSOR: https://github.com/stac-extensions/ceos-ard IT IS PLANNED TO DEPRECATE THIS EXTENSION ONCE THE NEW EXTENSION IS PUBLISHED.

The extensions are not officially approved by CEOS, but there's a desire to get CEOS approval. Nevertheless, the extensions have been discussed with CEOS. The STAC extensions don't allow to fulfill 100% target compliance (but most of it), but they surely allow to be 100% threshold compliant.

The extensions were written as part of the project openEO Platform with funding from ESA. Contact Matthias Mohr for details.

Contributing

All contributions are subject to the STAC Specification Code of Conduct. For contributions, please follow the STAC specification contributing guide Instructions for running tests are copied here for convenience.

Running tests

The same checks that run as checks on PR's are part of the repository and can be run locally to verify that changes are valid. To run tests locally, you'll need npm, which is a standard part of any node.js installation.

First you'll need to install everything with npm once. Just navigate to the root of this repository and on your command line run:

npm install

Then to check markdown formatting and test the examples against the JSON schema, you can run:

npm test