This post converts the selected engineering video into a quick written workflow so the user can understand the process before opening the full video. It is designed as a time-saving overview for students, engineers, and website visitors.

Source video: QGIS: How to make contour from DEM in QGIS
Step-by-step workflow summary for DEM to Contour in QGIS: Fast Step-by-Step Workflow
Visual overview of the main steps covered by the video.

Step-by-step workflow

  1. Load the DEM and verify its CRS and elevation unit.
  2. Clip the DEM to the area of interest to avoid unnecessary contours.
  3. Choose contour interval based on map scale and terrain steepness.
  4. Generate contours and add elevation attributes.
  5. Style index contours differently from intermediate contours.
  6. Export to GeoPackage, Shapefile, DXF, or DWG workflow as required.

Best use case

Useful for preliminary hydropower layouts, road alignment planning, site reconnaissance, catchment maps, and terrain figures.

Quality check

Too small a contour interval makes the map unreadable. Always match contour interval with map scale and DEM resolution.

Recommended output

By the end of this workflow, the user should have a clean engineering output such as a map, terrain product, hydraulic model setup, water-level result, or project concept figure that can be used in reports and presentations.

Time-saving note

Read this page first for the workflow logic. Then open the video only for the detailed screen clicks, software interface steps, and practical demonstration.