Analyze Ground Zero landforms

2026-05-14 06:02:14 -07:00
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+# Ground Zero Landform Pass
+
+This pass classifies the selected Ground Zero 1 km tile from the extracted
+1-meter DEM so terrain decisions are data-driven before gameplay polish begins.
+
+## Source
+
+- Tile: `gz_us_ca_pacifica_utm10n_e544_n4160`
+- DEM:
+  `Data/Terrain/Extracted/gz_us_ca_pacifica_utm10n_e544_n4160/gz_us_ca_pacifica_utm10n_e544_n4160_1m_dem_subset.tif`
+- Analysis:
+  `Data/Terrain/Analysis/gz_us_ca_pacifica_utm10n_e544_n4160/gz_us_ca_pacifica_utm10n_e544_n4160_landform_analysis.json`
+
+## First-Pass Classification
+
+- Hills: present.
+- Mountains: not present inside this MVP tile.
+- River: not confirmed from the DEM-only pass.
+- Stream: not confirmed, but low drainage/search zones exist.
+- Lake: not present.
+- Coastline: absent inside this tile, as confirmed by the water/shoreline pass.
+
+## Handling Decisions
+
+- Use hills and slope classes for movement modifiers, resource placement, and
+  foliage density.
+- Do not invent river, stream, lake, or coastline geometry from elevation alone.
+- Use the possible drainage/freshwater search zone as a candidate area for
+  later NHD or equivalent hydrography validation.
+- Keep ocean, bathymetry, and coastline handling attached to west/southwest
+  neighboring coastal tiles.
+
+## Gameplay Implications
+
+- Favor flatter and gentler terrain for the spawn area, primitive shelter, and
+  first resource cluster.
+- Treat steep and very steep areas as future slow-travel or stamina-cost terrain.
+- Use low coastal/valley areas as the search area for a later MVP freshwater
+  source.
+- Avoid placing a fake lake or river until a hydrography source confirms it.
+
+## Follow-Up
+
+The next map pass should verify neighboring tile edge coordinates against the
+registry before multi-tile stitching, then continue into foliage and
+biome-appropriate natural resources for the Ground Zero tile.