<div class="pf-content">Last time we had the task to create mountain ranges polygons for the whole world. I prepared a small tutorial referred to that. Maybe you can find something interesting for you. It will show you a model on how to select defined regions, slicing raster, smoothing and also exporting desired features. Enjoy!
Location and data
The first step is to find a location. It’s always useful to check wikipedia in order to do this, but also there is a very interesting website: http://peakbagger.com/default.aspx, where you can find many ranges from all over the world.
When you already have latitude and longitude you need to download elevation basedata. In this case it will be SRTM but you can also use e.g. GMTED2010 or other. You can just use this website http://srtm.csi.cgiar.org/SELECTION/inputCoord.asp for downloading SRTM slices.
Let’s go to QGIS!
It is easy to find the precise location in Qgis using the OSM place search plugin, which helps in finding places like cities, rivers or mountain peaks within seconds. The plugin is crawling OpenStreetMap database and shows possible entries and their polygons.
<span style="color: #444444;">Then you need to start the SRTM data preparation. To do this you can create a new polygon (a little bigger<span lang="en-US"> than the analysed range) and then cut your raster to this polygon (Raster
Location and data
The first step is to find a location. It’s always useful to check wikipedia in order to do this, but also there is a very interesting website: http://peakbagger.com/default.aspx, where you can find many ranges from all over the world.
When you already have latitude and longitude you need to download elevation basedata. In this case it will be SRTM but you can also use e.g. GMTED2010 or other. You can just use this website http://srtm.csi.cgiar.org/SELECTION/inputCoord.asp for downloading SRTM slices.
Let’s go to QGIS!
It is easy to find the precise location in Qgis using the OSM place search plugin, which helps in finding places like cities, rivers or mountain peaks within seconds. The plugin is crawling OpenStreetMap database and shows possible entries and their polygons.
<span style="color: #444444;">Then you need to start the SRTM data preparation. To do this you can create a new polygon (a little bigger<span lang="en-US"> than the analysed range) and then cut your raster to this polygon (Raster