Polygon to line 

This nodes finds lines of a polygon geometry

Mask Raster 

This node creates a mask raster

Resample/Warp (Reproject) 

Raster image resample, reprojection and warping node

Mosaic Raster 

This node mosaics a list of rasters

Raster Calculator 

Raster calculator node

Buffer 

Constructs a polygon at a specified distance from the geometry

Within 

Whether Geometry-1 is within Geometry-2

Union 

This node computes union of geometries

Equals 

Whether Geometry-1 is topologically equal to the Geometry-2

Shapefile writer 

Write a Shapefile