commit 4400f1c45f3fa9997493b4f212cfc5bed5cb2aa8
parent d93024a366f1e1220826c9dd93be3af367273963
Author: Anders Damsgaard <anders@adamsgaard.dk>
Date: Fri, 15 May 2026 23:46:43 +0200
docs: document DEM elevation option
Diffstat:
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/README.md b/README.md
@@ -28,9 +28,10 @@ Each file gets its own layer group. Layers are styled with pre-built QML styles
1. Open a QGIS project.
2. Go to **Plugins > TEM Loader > Load TEM XYZ files…**.
3. Select one or more `.xyz` inversion files.
-4. If the file metadata declares an EPSG code, imported layers use that CRS; otherwise the loader falls back to the project CRS, then to EPSG:4326.
-5. A GeoPackage (`.gpkg`) is written beside each source file with `points`, optional `doi`, and `layers` layers, and the corresponding layers are added to the project with `points` above `doi` above `layers`.
-6. Invalid or malformed `.xyz` inputs are rejected with explicit validation errors, and when multiple files are selected the loader continues with the remaining files while reporting the failing input filename.
+4. In the import options dialog, optionally enable **Adjust vertical position to digital elevation model** and choose a raster layer from the current project. When enabled, surface elevations are sampled from band 1 of the selected DEM; points outside the DEM keep their source elevation and emit a console warning.
+5. If the file metadata declares an EPSG code, imported layers use that CRS; otherwise the loader falls back to the project CRS, then to EPSG:4326.
+6. A GeoPackage (`.gpkg`) is written beside each source file with `points`, optional `doi`, and `layers` layers, and the corresponding layers are added to the project with `points` above `doi` above `layers`.
+7. Invalid or malformed `.xyz` inputs are rejected with explicit validation errors, and when multiple files are selected the loader continues with the remaining files while reporting the failing input filename.
## XYZ File Format
