feat: add orthometric_height_offset support#26
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座標変換処理に工事基準面補正を適用: - LLHParam構造体にvertical_datum_offsetフィールドを追加 - 順変換（ELLIPS2ORTHO）で T.P. + offset = 工事基準面高さ を計算 - 逆変換（ORTHO2ELLIPS）で 工事基準面高さ - offset = T.P. を計算 - ジオイド補正後にオフセットを適用
Simplify the vertical datum implementation by using a single height_offset parameter instead of the complex vertical_datum enum approach (pdca2). Changes: - Rename vertical_datum_offset to height_offset in LLHParam struct - Update comments to Japanese for clarity - Remove bidirectional correction logic (keep only ELLIPS2ORTHO) - Add comprehensive test suite for height offset functionality This simpler approach allows users to directly specify offset values without maintaining preset enum values.
Align field name with YAML specification for construction reference plane offset parameter.
Update test file to use orthometric_height_offset field name.
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takaya-murakami-RF
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Mar 4, 2026
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Summary
正標高変換時に高さオフセットを適用する機能を追加。荒川工事基準面（A.P.）等の工事基準面に対応。
Changes
llh_converter.hpp:LLHParam構造体にorthometric_height_offsetフィールド追加（デフォルト: 0.0）llh_converter.cpp:convertRad2XYZ()で ELLIPS2ORTHO 時のみオフセット適用height_offset_test.cpp: テストスイート追加Usage
Test plan