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1. Open a new project in QGIS

2. Add the FEWSGrid.txt as an delimited text layer to a empty project (Layer -> Add Layer -> Add Delimited Text Layer). In the popup window select 'First record has field names', e.g.:

   

3. Add the shape files (Layer -> Add Layer -> Add Vector Layer). After this the screen should look like this: 

   
4. Introduce unique IDs for each sub-area (or "sector") and each receptor
   1. Select a layer and open its attribute table (Right click -> Open attribute table)
   2. 'Toggle editing mode' (pencil icon)
   3. 'Open field calculator'
      
      1. Check the 'Create a new field' box and choose an 'output field name' (receptorID or areaID depending on the layer you selected)
      2. Set 'Expression' to $rownum
         Image Added
      3. Click 'Ok'Image Removed
   4. 'Save edits' and once more 'Toggle editing mode'
   5. Repeat a-d for the other layer

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