The QGIS is an open source free geographic information system software. We will guide you in generating a contour map in shapefile format from a DSM map by Altizure.

  1. Download the sample DSM file from the bottom of the page https://www.altizure.com/support/articles/download_assets
    tutorial_dsm_contour_1-1.png

  2. Download and install QGIS from http://www.qgis.org/en/site/

  3. Load the downloaded sample DSM file, “orthomap_dsm.tif”
    tutorial_dsm_contour_2-1.png

  4. From menu bar, select “Raster” → “Extraction” → “Contour”
    tutorial_dsm_contour_3-1.png

  5. Configure contour extraction setting. Output location, contour interval...etc
    tutorial_dsm_contour_4-1.png

  6. Done
    tutorial_dsm_contour_5-1.png