Operating system: Windows 10, 64 bit. QGIS Version: 2.13.3 which I installed via the QGIS.org website.
I need contour lines for a small area in Portugal.
I saw a guide posted here: http://planet.qgis.org/planet/tag/contours/ which explains how to get some very detailed contour lines using a DEM raster image.
I have tried to search for DEM raster images but they all seem to not have the correct detail level and I end up with very straight contours.
Can any of you point me towards a place for downloading (if possible) free DEM raster images in a 1m x 1m grid?