Add uv setup and document expected orthophoto warnings

README.md

@@ -8,6 +8,11 @@ This repository converts DGM1 elevation tiles into Unity-ready 16-bit PNG height
 - DGM1 source tiles placed in `raw_dgm1/` as `dgm1_<utm_zone>_<easting>_<northing>.tif` (with matching `.tfw` files).
 - Raw inputs (`raw_dop/`, `raw_3dgeb_lod1/`, `raw_3dgeb_lod2/`) are **kept out of git**; keep them locally or document how to fetch/regenerate.
 
+### Environment setup (uv)
+- Create a project venv: `uv venv && source .venv/bin/activate`.
+- Install dependencies from `pyproject.toml`: `uv sync` (generates `uv.lock`; warning-free with dependency-groups).
+- If wheels fail to resolve, ensure system GDAL is present (e.g., `brew install gdal` or `apt-get install gdal-bin libgdal-dev`), then rerun `uv sync`.
+
 ### Repository Layout
 - `raw_dgm1/` — input rasters (not versioned).
 - `raw_dop/` — raw orthophoto downloads (JP2/J2W/XML), ignored in git.
@@ -21,15 +26,16 @@ This repository converts DGM1 elevation tiles into Unity-ready 16-bit PNG height
 - `AGENTS.md` — contributor guide.
 
 ### Quick Start
-1. Export Unity heightmaps and manifest (builds `work/dgm.vrt` automatically if missing):
+1. Activate the uv venv (`source .venv/bin/activate`) or prefix commands with `uv run`.
+2. Export Unity heightmaps and manifest (builds `work/dgm.vrt` automatically if missing):
    ```bash
-   python3 export_heightmaps.py
+   uv run python export_heightmaps.py
    ```
 3. Import the PNGs into Unity Terrains using `tile_index.csv` for placement and consistent height scaling (0–65535).
 
 ### Key Commands
 - Refresh VRT: `gdalbuildvrt work/dgm.vrt raw_dgm1/*.tif`
-- Run export pipeline: `python3 export_heightmaps.py`
+- Run export pipeline: `uv run python export_heightmaps.py`
 - Inspect an output tile: `gdalinfo export_unity/height_png16/<tile>.png | head`
 
 ### Workflow Notes
@@ -44,9 +50,10 @@ This repository converts DGM1 elevation tiles into Unity-ready 16-bit PNG height
 1. Ensure DOP JP2s are present in `raw_dop/jp2/` (use `raw_dop/dlscript.sh` if needed).
 2. From `GeoData/`, run:
    ```bash
-   python3 export_ortho_tiles.py
+   uv run python export_ortho_tiles.py
    ```
    This builds `work/dop.vrt` if missing and writes `export_unity/ortho_jpg/<tile>.jpg` + `.jgw` aligned to `tile_index.csv`.
+   - If you see `Computed -srcwin ... falls partially outside source raster extent` warnings, the DOP coverage is slightly smaller than the tile footprint; edge pixels will be filled with NoData/zeros. Add adjacent JP2s or shrink the requested window if you need to avoid the warning.
 
 ### Buildings
 The building export pipeline is temporarily disabled while we choose a mesh conversion approach (GDAL lacks a native OBJ writer). CityGML LoD2 sources remain in `raw_3dgeb_lod2/` locally (ignored in git); consider CityGML→glTF/OBJ tools (e.g., citygml-tools + cityjson2gltf) for future integration.