topo2cad

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Turn a GPS coordinate into engineering deliverables: DXF for CAD, poster maps, and a print-ready Thai government site-map sheet. OpenStreetMap + Copernicus DEM + Microsoft ML footprints. https://map2cad.boring9.dev # topo2cad Generate a CAD file (DXF) around a GPS point: topographic contours (Copernicus 30m DEM) plus OpenStreetMap roads, buildings, and named places, in UTM 47N meters. ## Usage Requires only [uv](https://docs.astral.sh/uv/) — dependencies install automatically. ```bash # 1. Download the DEM tile covering your latitude/longitude (once per 1°x1° tile). # Tile naming: N<lat>_00_E<lon>_00 (integer degrees, floor of your coordinate). # Tiles N13 and N14 (Bangkok / Lopburi) are already in dem/. curl -o dem/dem_n14_e100.tif "https://copernicus-dem-30m.s3.amazonaws.com/Copernicus_DSM_COG_10_N14_00_E100_00_DEM/Copernicus_DSM_COG_10_N14_00_E100_00_DEM.tif" # 2. Generate the DXF. uv run scripts/topo2cad.py \ --lat 14.8164876968956 --lon 100.511644184589 \ --radius 1000 \ --dem dem/dem_n14_e100.tif \ --out output/topo_gps_1km.dxf # Or give each run its own timestamped folder instead of naming the file: uv run scripts/topo2cad.py --lat 15.83384548 --lon 104.39445555 \ --width 500 --height 400 --dem dem/dem_n15_e104.tif --outdir output/runs ``` The UTM zone is derived from the coordinate, so sites east of 102°E use EPSG:32648 automatically — forcing them into 47N would introduce a +0.37% scale error. `--outdir` also works on `generate_detailed_site_map.py`. ## Detailed site map Print-ready vector PDF with classified roads, building footprints labeled by name or B### code, water, legend, attribution — plus a building inventory CSV for the manual name-correction

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