{"id":37651964,"url":"https://github.com/stac-extensions/card4l","last_synced_at":"2026-01-16T11:34:53.955Z","repository":{"id":43409946,"uuid":"341621580","full_name":"stac-extensions/card4l","owner":"stac-extensions","description":"Describes how to comply to the CEOS CARD4L specifications (SAR and Optical) with STAC","archived":false,"fork":false,"pushed_at":"2023-10-17T14:20:04.000Z","size":133,"stargazers_count":13,"open_issues_count":6,"forks_count":4,"subscribers_count":4,"default_branch":"main","last_synced_at":"2024-01-27T17:00:38.474Z","etag":null,"topics":["card4l","stac"],"latest_commit_sha":null,"homepage":"","language":null,"has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"apache-2.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/stac-extensions.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null}},"created_at":"2021-02-23T16:43:34.000Z","updated_at":"2023-03-21T14:37:56.000Z","dependencies_parsed_at":"2023-01-29T14:00:53.070Z","dependency_job_id":"e0e4788b-9add-4332-9083-daa235bd6d48","html_url":"https://github.com/stac-extensions/card4l","commit_stats":{"total_commits":48,"total_committers":3,"mean_commits":16.0,"dds":0.125,"last_synced_commit":"831b7ad5af85b1b95d6493fb9cb984134890b44b"},"previous_names":[],"tags_count":1,"template":false,"template_full_name":null,"purl":"pkg:github/stac-extensions/card4l","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stac-extensions%2Fcard4l","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stac-extensions%2Fcard4l/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stac-extensions%2Fcard4l/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stac-extensions%2Fcard4l/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/stac-extensions","download_url":"https://codeload.github.com/stac-extensions/card4l/tar.gz/refs/heads/main","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/stac-extensions%2Fcard4l/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":28478349,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-01-16T06:30:42.265Z","status":"ssl_error","status_checked_at":"2026-01-16T06:30:16.248Z","response_time":107,"last_error":"SSL_read: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["card4l","stac"],"created_at":"2026-01-16T11:34:53.891Z","updated_at":"2026-01-16T11:34:53.945Z","avatar_url":"https://github.com/stac-extensions.png","language":null,"funding_links":[],"categories":[],"sub_categories":[],"readme":"# STAC CARD4L Extensions\n\n- **Title:** CARD4L (Optical and SAR)\n- **Field Name Prefix:** card4l\n- **Scope:** Item\n- **Extension [Maturity Classification](https://github.com/radiantearth/stac-spec/tree/master/extensions/README.md#extension-maturity):** Pilot\n- **Owner**: @m-mohr\n\nThis repository contains two STAC extensions that specifies how to create STAC Items (and Collections)\nthat comply to the [CEOS CARD4L](http://ceos.org/ard/) product family specifications for either:\n- Optical - Surface Reflectance\n- Optical - Surface Temperature\n- SAR - Normalized Radar Backscatter\n- SAR - Polarimetric Radar\n\nThere are two STAC extensions, one for Optical and one for SAR:\n- [Optical](optical/README.md)\n- [SAR](sar/README.md)\n\n## Disclaimer\n\n**WE ARE WORKING ON A SUCCESSOR: \u003chttps://github.com/stac-extensions/ceos-ard\u003e**\n**IT IS PLANNED TO DEPRECATE THIS EXTENSION ONCE THE NEW EXTENSION IS PUBLISHED.**\n\nThe extensions are not officially approved by CEOS, but there's a desire to get CEOS approval.\nNevertheless, the extensions have been discussed with CEOS.\nThe STAC extensions don't allow to fulfill 100% target compliance (but most of it),\nbut they surely allow to be 100% threshold compliant.\n\nThe extensions were written as part of the project [openEO Platform](https://openeo.cloud)\nwith funding from [ESA](https://www.esa.int).\nContact [Matthias Mohr](https://github.com/m-mohr) for details.\n\n## Contributing\n\nAll contributions are subject to the\n[STAC Specification Code of Conduct](https://github.com/radiantearth/stac-spec/blob/master/CODE_OF_CONDUCT.md).\nFor contributions, please follow the\n[STAC specification contributing guide](https://github.com/radiantearth/stac-spec/blob/master/CONTRIBUTING.md) Instructions\nfor running tests are copied here for convenience.\n\n### Running tests\n\nThe 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. \nTo run tests locally, you'll need `npm`, which is a standard part of any [node.js installation](https://nodejs.org/en/download/).\n\nFirst you'll need to install everything with npm once. Just navigate to the root of this repository and on \nyour command line run:\n```bash\nnpm install\n```\n\nThen to check markdown formatting and test the examples against the JSON schema, you can run:\n```bash\nnpm test\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstac-extensions%2Fcard4l","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fstac-extensions%2Fcard4l","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fstac-extensions%2Fcard4l/lists"}