| aspect | Calculate topographic aspect from a DEM | 
| carmel | Digital Elevation Model of Mount Carmel | 
| CI | Calculate the Convergence Index (CI) from a slope raster | 
| dem | Small Digital Elevation Model | 
| detrend | Detrend a Digital Elevation Model | 
| dist_to_nearest | Calculate raster of distances to nearest feature | 
| extract2 | Extract raster values by lines or polygons | 
| flowlength | Calculate flow length | 
| focal2 | Apply a focal filter on a raster | 
| focal2r | Apply a focal filter on a raster (R) | 
| footprints | Footprints | 
| golan | Digital Elevation Model of Golan Heights | 
| landsat | RGB image of Mount Carmel | 
| layer_to_matrix | Get 'stars' layer values as matrix | 
| layer_to_vector | Get 'stars' layer values as vector | 
| make_grid | Make 'stars' grid from 'sf' layer | 
| matrix_extend | Extend matrix | 
| matrix_get_neighbors | Get neighboring cell values for given matrix cell | 
| matrix_to_stars | Convert 'matrix' to 'stars' | 
| matrix_trim | Trim matrix | 
| mode_value | Mode | 
| normalize_2d | Normalize a 2D 'stars' object | 
| normalize_3d | Normalize a 3D 'stars' object | 
| rgb_to_greyscale | Convert RGB to greyscale | 
| slope | Calculate topographic slope from a DEM | 
| trim2 | Remove empty outer rows and columns | 
| w_azimuth | Create matrix with azimuths to center | 
| w_circle | Create matrix with circular weight pattern |