2. Overview of Steps required - rossoe/Arma3_QGIS GitHub Wiki

First an overview of the steps required:

For Heightmap:

  • Load heightmap into QGIS (drag and drop)
  • Set QGIS to appropriate CRS for location of your HM
  • Create shapefile & generate perfect square using Advanced Digitizing panel
  • Obtain extents from square feature
  • Run 2 GDAL commands
    • First to set cell size, CRS and then clip to shapefile square extents
    • Second to convert to .asc file

For Satellite image:

For single tile export

  • Load in just the '.map' files generated from Terra Incognita into QGIS
  • Merge rasters
  • Obtain extents from square feature
  • gdalwarp command will set cell size, CRS and then clip to shapefile square extents

For 4 tile export (large projects 40960 and above)

  • Load in just the '.map' files generated from Terra Incognita into QGIS
  • Merge Rasters
  • Create grid -- 2 x 2 Feature
  • Move each quarter to its own shapefile layer
  • Obtain extents from each quarter feature
  • Run gdalwarp command for each quarter to set cell size and CRS and clip to shapefile square extents

For Road Shapefile:

  • Load in road shapefile
  • Clip vector to square shape
  • Save output of Clip to a new shapefile layer
  • Set new shapefile to CRS 31N
  • Set QGIS project CRS to UTM-31N
  • Collect extents from your square shapefile
  • Run v.transform on road shapefile using calculated extents from square shapefile
  • Open Attribute Table on new Transformed shapefile
    • Set ID and ORDER fields