PySTAC

The pystac-ext-storage package is a PySTAC extension for the STAC Storage Extension. It allows you to describe cloud storage attributes for STAC assets. Specifically, it provides fields to capture information such as:

• storage platform: The platform hosting the asset (e.g., AWS, GCP, Azure).
• region: The geographic region where the asset is stored.
• tier: The storage tier (e.g., standard, infrequent access).
• requester-pays: Configuration indicating if the requester is responsible for data transfer costs.

PySTAC is a Python library designed for working with SpatioTemporal Asset Catalogs (STAC). Key capabilities include:

• STAC Version Support: Reading and writing STAC version 1.0. It is designed to read older versions while always writing the latest supported version.
• In-memory Manipulation: Perform manipulations of STAC catalogs directly in memory.
• Extensible I/O: Extend STAC metadata I/O to support various platforms, such as different cloud providers.
• Efficient Crawling: Crawl STAC catalogs efficiently by only reading STAC objects into memory when they are needed.
• Catalog Link Management: Easily generate catalogs using different linking strategies: "absolute published", "relative published", and "self-contained" catalogs, following STAC best practices.

The pystac-ext-render package is a PySTAC extension for the Render Extension specification. It allows you to add fields to STAC Items and Assets that describe visualization parameters, such as:

• Rescaling: Defining how pixel values map to display values.
• Color maps: Specifying color palettes for visualization.
• Expressions: Defining mathematical expressions for rendering.
• Tile matrix set configurations: Describing how tiles are structured for rendering.

The pystac-ext-eo package is a PySTAC extension designed to support the Electro-Optical (EO) Extension. It provides specialized fields for describing electro-optical sensor data within STAC Items, specifically covering:

• Spectral band information
• Cloud cover
• Snow cover