Verify Ground Zero neighbor edges

2026-05-14 06:09:10 -07:00
parent 2344a11519
commit 7a05e324a3
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+# Ground Zero Neighbor Edge Verification
+
+The Ground Zero tile and its eight immediate neighbor placeholders were checked
+against the tile registry before any multi-tile stitching work.
+
+## Inputs
+
+- Registry: `Data/Tiles/ground_zero_tiles.json`
+- Verification script: `Scripts/verify_ground_zero_neighbor_edges.py`
+- Output:
+  `Data/Terrain/Analysis/gz_us_ca_pacifica_utm10n_e544_n4160/gz_us_ca_pacifica_utm10n_e544_n4160_neighbor_edge_verification.json`
+
+## Result
+
+The registry coordinate pass succeeded.
+
+- Ground Zero tile:
+  `gz_us_ca_pacifica_utm10n_e544_n4160`
+- Ground Zero bounds:
+  `544000,4160000 -> 545000,4161000` in EPSG:26910 / UTM zone 10N.
+- Verified tile count: `9`
+- Found neighbor count: `8`
+- All tiles use `1000 m x 1000 m` bounds.
+- All tile IDs match their minimum UTM kilometer coordinates.
+- North, south, east, and west neighbors share exact full 1 km edges with the
+  Ground Zero tile.
+- Northeast, southeast, southwest, and northwest neighbors touch Ground Zero at
+  corners only.
+
+## Stitching Decision
+
+The registry is ready for coordinate-based neighbor stitching around Ground
+Zero. This pass verifies tile bounds and adjacency only; it does not verify
+elevation seam continuity because neighbor DEM extraction has not been run yet.
+
+The next terrain stitching pass should extract or generate the relevant
+neighbor DEMs, compare edge sample elevations, and then choose the seam blending
+rule.