Fix Transformation from ProjString by auto-adding +type=crs #124
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Fixes #102 by automatically appending +type=crs to ProjString objects when creating a CRS. Without this parameter, proj_create() creates a projection object instead of a CRS object, causing Transformation to fail with "source_crs is not a CRS". The fix ensures ProjString works consistently with plain strings when used in Transformation and other CRS operations. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Tests verify that ProjString objects work identically to plain strings when used in Transformation. Includes test cases for: - Original issue #102 example (aeqd projection) - Simple longlat projection - ProjString with +type=crs already present - Both source and target as ProjString All tests verify that the same transformation pipeline is created regardless of whether String or ProjString is used. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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Fixes #102 by automatically appending +type=crs to ProjString objects when creating a CRS. Without this parameter, proj_create() creates a projection object instead of a CRS object, causing Transformation to fail with "source_crs is not a CRS".
The fix ensures ProjString works consistently with plain strings when used in Transformation and other CRS operations.
🤖 Generated with Claude Code
Human reviewed, seems reasonable to me and a small change.