[neovolgan]

Implements section 1 of the transfer contract (#2).

What changes

• WorldGeoReference.RotationDegrees:
  • range −45…45, default 0;
  • rotates the local (east, south) metric plane about the bounds centre;
  • placement is anchored to the rotated bounds' minimum corner, at the origin cell.
• With rotation 0, Project and Geographic run the original formulas verbatim, so existing worlds project bit-identically. A test compares them against the old expression.
• SectionBounds is the lon/lat box of the section's four corners, clipped to the reference.
• RequiredTiles uses the rotated corners.
• A rotated reference raises the world format to 7, in C# and JS, so an older editor refuses such a file instead of dropping the rotation. Unrotated worlds keep their version.
• OsmWorldImportRequest gains RotationDegrees = 0, so the UI can expose it later.
• worldGeographic (world-geography.js), used by the elevation overlay, mirrors the core projection.

Tests

• RotatedProjectionTests:
  • round-trip in several sections;
  • a street at bearing 11.22° becomes a grid column;
  • rotated bounds are anchored at the origin;
  • the section source box covers all corners;
  • validation rejects out-of-range and non-finite rotations;
  • version 7.
• Importer test: a 16×10 m house drawn skewed in real lon/lat imports under the rotated reference exactly like a north-aligned house under an unrotated one (same position, size and footprint kind). Its original lon/lat stays in SourceFeatures untouched.
• JS: worldGeographic matches values printed by the C# projection to within 1e-11°; unrotated output is unchanged.
• Results:
  • dotnet run --project tests/SimplePZMapmaker.Tests (with PZMAP_WORKSPACE set): 338/338 passed;
  • npm test: 184/184 passed.

For Pilna this gives 4774×5521 tiles at 1 m/tile with θ = −11.22, using real coordinates instead of the pre-rotated pseudo lon/lat the pipeline used until now.

🤖 Generated with Claude Code

https://claude.ai/code/session_015ECCGjSrSADcjxBmXdCBpm

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Generated by Claude Code