contours

contours/README.md

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+Countour line generator from LIDAR data
+---------------------------------------
+
+Usage:
+
+1. Download contour lines in format `6062999.75,584000.75,88.07`: coordinate
+   pair and height (in meters) to `DTM_XX_YY_N.zip` files.
+2. Adjust `BOUNDS` in the Makefile.
+3. Run `make -j$(nproc) smooth_<X>.gpkg`. This will output a geo-package with
+   contour lines every `X` meters. X can be fractional (e.g.
+   `smooth_2.5.gpkg`).
+
+Dependencies:
+
+- postgis
+- gdal-bin
+- unzip
+
+TODO:
+
+1. Replace `managedb` stack with postgis-over-docker. This will lead to a less
+   fragile postgis setup.
+2. Accept `BOUNDS` in a way that does not require to change the Makefile.