39 lines
1.4 KiB
Markdown
39 lines
1.4 KiB
Markdown
# Ground Zero Neighbor Edge Verification
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The Ground Zero tile and its eight immediate neighbor placeholders were checked
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against the tile registry before any multi-tile stitching work.
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## Inputs
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- Registry: `Data/Tiles/ground_zero_tiles.json`
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- Verification script: `Scripts/verify_ground_zero_neighbor_edges.py`
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- Output:
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`Data/Terrain/Analysis/gz_us_ca_pacifica_utm10n_e544_n4160/gz_us_ca_pacifica_utm10n_e544_n4160_neighbor_edge_verification.json`
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## Result
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The registry coordinate pass succeeded.
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- Ground Zero tile:
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`gz_us_ca_pacifica_utm10n_e544_n4160`
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- Ground Zero bounds:
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`544000,4160000 -> 545000,4161000` in EPSG:26910 / UTM zone 10N.
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- Verified tile count: `9`
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- Found neighbor count: `8`
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- All tiles use `1000 m x 1000 m` bounds.
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- All tile IDs match their minimum UTM kilometer coordinates.
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- North, south, east, and west neighbors share exact full 1 km edges with the
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Ground Zero tile.
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- Northeast, southeast, southwest, and northwest neighbors touch Ground Zero at
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corners only.
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## Stitching Decision
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The registry is ready for coordinate-based neighbor stitching around Ground
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Zero. This pass verifies tile bounds and adjacency only; it does not verify
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elevation seam continuity because neighbor DEM extraction has not been run yet.
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The next terrain stitching pass should extract or generate the relevant
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neighbor DEMs, compare edge sample elevations, and then choose the seam blending
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rule.
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