Using QGIS to Interpolate Air Pollution Sampling Points using IDW

This video tutorial shows how to create an Inverse Distance Weighted (IDW) interpolated raster from a spreadsheet file containing sampled points dispersed around N.W England in the UK. It uses QGIS and shows how to generate a final map complete with Legend, Title, Scalebar and North arrow. QGIS can be downloaded here (qgis.org/en/si.... The country SHAPE file of the UK (or any other country) can be downloaded here (www.diva-gis.or.... The spreadsheet containing the sample data for this exercise can be downloaded here (www.ukscience.o....