Point sampling on raster

1. Load the the multiband raster file clip_SA2_2017-03-28_pca.tif, which should be available in the course data. It contains the first 5 component as a result of a pricipal components analysis of a Sentinel-2 scene.
   1. Open Vector --> Research tools --> regular points. Set the Input extent Layer to Use layer/canvas extent.
   2. Enter the number 600 (meters) to Point spacing.
   3. Click Use point spacing on.
   4. Enter an output shapefile name systematic_grid.shp and path by clicking Browse.
   5. Confirm with Run. The new layer is added to the Layer Panel .