v0.9.0

This release introduces support for multiple model versions (Tessera v1.0 and 1.1) along with dataset variants so that multiple model runs can be selected and compared. All data downloads now go through the an AWS Open Data S3 bucket using anonymous requests, with end-to-end checksum verification. This replaces the previous direct HTTP mechanism and should hopefully be faster and more reliable.

New Features

• Dataset variants (--dataset-variant, dataset_variant=): The
  GeoTessera class and the info, download, and coverage CLI commands
  now accept a --dataset-variant option (default vultr) alongside
  --dataset-version. --dataset-version now also accepts the v1.1 series
  in addition to v1.
  The resolved version/variant is recorded in a tessera_metadata.json
  provenance sidecar next to downloaded tiles (#250 @avsm)
• coverage --by-source: New flag that renders each (version, variant)
  source in a distinct colour on the coverage map and globe viewer. When set
  without an explicit --dataset-version/--dataset-variant, it downloads
  every known version's manifest and renders all sources together. The
  globe.html viewer gains toggleable per-source layers and multi-dataset
  tile tooltips (#250 @avsm)
• Coordinate lists accept iterables: Functions taking coordinate lists now
  accept any iterable or generator (e.g. zip(lons, lats)), not just
  materialised lists (#259 @mdales)
• geotessera-registry s3scan: New subcommand that spiders the public S3
  bucket for embedding tiles across versions and variants and writes per-version
  manifest.parquet and landmasks.parquet files in an S3-mirroring layout
  (#250 @avsm)
• geotessera-registry zarr-stretch: New subcommand that computes a global
  cross-zone RGB stretch and stores it on a Zarr root for consistent colour
  across UTM zones. Supports --mode bands and --mode pca (learning three
  colour axes from the 128 embedding bands), with percentile, sampling, and
  worker controls (@avsm)
• Chroma and gamma controls on zarr-global-preview: The Zarr GeoTIFF
  preview renderer gains --gamma (per-channel power-law adjustment) and
  --saturation (luma/chroma decomposition with chroma scaling) for richer
  colour output, consuming the global stretch produced by zarr-stretch (@avsm)

Breaking Changes

• Downloads now use AWS S3 only: All embedding, manifest, and landmask
  downloads switched from direct HTTP to anonymous (unsigned) S3 requests via
  The default base URL is now https://s3.us-west-2.amazonaws.com/tessera-embeddings.
  Custom non-S3 mirror URLs are no longer supported (#276 #278 @avsm)
• New dependencies: botocore>=1.43.14 and awscrt>=0.33.0 are now
  required (@avsm)
• Per-version registry file renamed: The downloaded registry file is now
  named manifest.parquet (per dataset version) rather than registry.parquet.
  The legacy registry.parquet name is still auto-detected for local
  --registry-dir overrides (#250 @avsm)