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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
         
      3. Click 'Ok'
   4. 'Save edits' and once more 'Toggle editing mode'
   5. Repeat a-d for the other layer
5. Intersect the receptor layer with the area layer (Vector -> Geoprocessing Tools -> Intersect) and save the new layer under a new name (in this example ResBuildings_hotspot.shp)
   The resulting layer will contain all the buildings within the hotspot and associate them with the areaID of the area there in. 
   Image Added
6.  Create a new polygon shape file from the FEWSGrid layer (Vector -> Geometry tools -> Voronoi Polygons) and save under a new name (in this example FEWSGrid_polygon.shp). 

1. Add the shapes file (Layer -> Add Layer -> Add Vector Layer)

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