README.md updated

README.md

@@ -65,7 +65,7 @@ The usage of the packages is best illustrated by means of five examples. To succ
 - **examples/gridded_NASADEM_HIMI.py**: Compute topographic parameters (slope angle and aspect, horizon and sky view factor) from NASADEM (~30 m) for a ~100x100 km region centred at Heard Island and McDonald Islands. DEM grid cells, which are at least 20 km apart from land, are masked to speed-up the horizon computation.
 - **examples/gridded_SwissALTI3D_Alps.py**: Compute topographic parameters (slope angle and aspect, horizon and sky view factor) from swissALTI3D (~2 m) for an a 3x3 km region in the European Alps. The outer DEM domain is simplified and represented by a triangulated irregular network (TIN) to reduce the large memory footprint of the DEM data.
 
-The additional functions **horizon_gridcells()** and **horizon_locations()** are useful in case terrain horizon is only needed for a subset of locations within a geographical region. These two functions additional allow to output the distance to the horizon. The former function allows to compute horizon only at the grid cells' centre, while the latter can be used to compute terrain horizon for arbitrary spatial locations.
+The additional functions **horizon_gridcells()** and **horizon_locations()** are useful in case terrain horizon is only needed for a subset of locations within a geographical region. These two functions additional allow to output the distance to the horizon. The former function allows to compute horizon only for the grid cells' centre, while the latter can be used to compute terrain horizon for arbitrary spatial locations.
 - **examples/gridcells_NASADEM_Himalayas.py**: Compute topographic parameters (slope angle and aspect, horizon and sky view factor) from NASADEM (~30 m) for four grid cells in the Himalayas (Mount Everest region). The horizon's elevation angle and distance is visualised in a plot.
 - **examples/locations_NASADEM_Switzerland.py**: Compute topographic parameters (slope angle and aspect, horizon and sky view factor) from NASADEM (~30 m) for 10 arbitrary locations in Switzerland. The horizon's elevation angle and distance is visualised in a plot.