Making shaded relief from digital elevation models (DEMs) in QGIS: a British Columbia perspective

reblog-ed from Wandering Cartographer, sedikit tentang DEM, SRTM, EPSG, QGIS blending

The Wandering Cartographer

Who would not agree with Tom Patterson, creator of the fabulous shadedrelief.com website, when he said, “There is no more important component of a map than the shaded relief.”

But the topic of creating your own shaded relief from a DEM is rather complex, so I’ve made a few assumptions in this how-to. I’m assuming:

  • you know your way around QGIS (I am using QGIS 2.18 for this post)
  • you’re familiar with the idea of projections, and re-projecting raster data
  • you know that each projection/datum combination has an EPSG number, which is a convenient way to refer to it. For example
    • Lat/Long/WGS84 = 4326
    • UTM Zone 9N/WGS84 = 32609
    • BC Albers = 3005

If that’s the case, there are really only three things you need to know in order to made your own hillshades:  where to get the data, how to transform it, and what pitfalls to avoid.

Why…

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