assign_index: Add GeoTIFF & STAC metadata support#56
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dcherian merged 5 commits intoxarray-contrib:mainfrom Nov 17, 2025
Merged
assign_index: Add GeoTIFF & STAC metadata support#56dcherian merged 5 commits intoxarray-contrib:mainfrom
assign_index: Add GeoTIFF & STAC metadata support#56dcherian merged 5 commits intoxarray-contrib:mainfrom
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dcherian
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assign_index: Add STAC metadata support
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The GeoTIFF specification uses these attributes to describe the spatial information. STAC uses the projection extension AFAIK - https://github.com/stac-extensions/projection - which has a transform attribute. |
Resolves xarray-contrib#55 This commit adds support for creating RasterIndex from STAC metadata (model_tiepoint and model_pixel_scale attributes) in addition to the existing GeoTransform and coordinate array methods. Changes: - Enhanced get_affine() to extract affine transforms from STAC metadata - Added validation that Z pixel scale must be 0 (2D rasters only) - STAC metadata attributes are automatically cleaned up after use - Improved error messages when coordinates lack explicit values - Added comprehensive test coverage for assign_index function 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Documents the decision-making logic and priority order used by assign_index() when detecting affine transformations from various metadata formats (GeoTransform, STAC proj:transform, GeoTIFF metadata, and coordinate arrays). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Add two new classmethods to RasterIndex: - from_tiepoint_and_scale: Create index from GeoTIFF metadata - from_stac_proj_metadata: Create index from STAC proj:transform Refactored affine transform extraction into reusable helper functions in lib.py that are used by both assign_index and the new classmethods: - affine_from_tiepoint_and_scale - affine_from_stac_proj_metadata This provides more flexible APIs for creating RasterIndex instances directly from metadata dictionaries. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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Resolves #55
This commit adds support for creating RasterIndex from STAC metadata
(model_tiepoint and model_pixel_scale attributes) in addition to the
existing GeoTransform and coordinate array methods.
Changes:
🤖 Generated with Claude Code
Co-Authored-By: Claude noreply@anthropic.com