![]() ![]() This could be simple values such as text or numbers, or also layers and files. In the left hand column you’ll find a window with possible input types into the model. You can access the Graphical Modeler or Processing Modeler through the Menu under Processing > Graphical Modeler. Getting started with the processing modeler Now load the population data GeoTIFF into QGIS (hrsl_tza_pop.tif) - again easiest by dragging and dropping it into QGIS, or alternatively through the menu Layer - Add Layer - Add Raster Layer. Population dataĮxtract the zip file for Tanzania that you have downloaded from the Columbia University page. This step is required because otherwise when working directly on the GeoJSON the projection doesn’t seem to be picked up correctly and hence the process fails to calculate the numbers. Also make sure to name the exported file to something meaningful, like admin_zones You can pick a format of your choice and make sure to leave Add save file to map checked. We will have to export the polygon to a new layer by right-clicking on the layer and then Export > Save Feature as. There will be two layers in the boundaries GeoJSON, one with points, one with polygons. Alternatively you can add it through the menu via Layer - Add layer - Vector Layer. Grab the GeoJSON you have downloaded from the Overpass API and drag it into QGIS. The following steps will explain how to load the data sets into QGIS. to Overpass Turbo query - Click on Run, click continue anyway when a warning comes up, then click Export once processing has finished and Download as GeoJSON OpenStreetMap level 4 administrative boundaries, extracted using the Overpass API. ![]() Data typeĭata Download ( Facebook Blog Post about Open Population Datasets )Īdministrative boundaries: Regions of Tanzania For this I need the following data input.
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