https://teotl.dev/tags/stac/Recent content in Stac on Lost in TabHugoen-usMon, 23 Feb 2026 12:00:00 +0000https://teotl.dev/posts/2026/02/23/remaking-cirrus-reflections-on-five-years-spent-building-an-open-source-data-orchestrator/Mon, 23 Feb 2026 12:00:00 +0000https://teotl.dev/posts/2026/02/23/remaking-cirrus-reflections-on-five-years-spent-building-an-open-source-data-orchestrator/Cirrus, Element 84’s open-source data orchestration framework, recently turned five years old — and we’ve rebuilt it at least three times along the way. This is a retrospective on where Cirrus came from, from its origins in NASA’s Cumulus through the STAC Workflows idea, the project CLI, the SWOOP detour, and finally the v1.0.0 release, plus a look at where it’s headed next.https://teotl.dev/posts/2025/11/04/metadata-makes-the-data-format-metadata-storage-and-representation-across-array-formats/Tue, 04 Nov 2025 12:00:00 +0000https://teotl.dev/posts/2025/11/04/metadata-makes-the-data-format-metadata-storage-and-representation-across-array-formats/When configured equivalently, COG and Zarr store the exact same data bytes. So what actually distinguishes one raster format from another? Metadata. We get philosophical about what metadata even is, examine how TIFF and Zarr each represent it, tour the various ways geospatial coordinate information is encoded across formats, ask where metadata should live, and make the case that formal, versioned conventions are what truly enable interoperability.https://teotl.dev/posts/2025/07/09/chunks-and-chunkability-an-origin-story/Wed, 09 Jul 2025 12:00:00 +0000https://teotl.dev/posts/2025/07/09/chunks-and-chunkability-an-origin-story/Raster data formats are chunked internally, but the cloud has exposed these internal implementation details. We dig into the finer details of chunking to understand how chunking has become something tyrannical, dictating how we can and can’t access data efficiently. Part 2 of 2.