This is what the completed model will look like. Let’s build it together, step by step.

First we need to add the UKCEH dataset along with “Union”, “Distance map”, “Less”, “Intersection” and “Numeric constant.”

Connect Deciduous Woodland and Coniferous Woodland to the Union component and rename it “Woodland.”

Connect each of the other components as shown, rename the final component “Grassland 25” to indicate that it represents grassland within 25 m of woodland. Save and run the model.

Now we simply replicate the last 3 components of the row. Right click each component and select clone to copy them one by one.

Arrange the new components into a second row.

And connect the output from “Grassland 25” to the input of the second row’s “Distance map.”

Connect the rest of the second row components as shown and rename the final Intersection component “Grassland 50.”

You can save and run the model to verify it is working.

Repeat the process to create a third row of components connected as shown.

And a fourth row.

Now, to view the results on the Map, add converter and Map layer component and connected the output from Woodland and each of the Grassland ## components to the converter.

Save and run the model and then toggle Map view to see the results. Here, I have edited the category colours to make a better visual.

In close up you can see how the model is identifying strips of grassland (each a single cell wide) around the edges of woodland from 25m to 100m distant from the woodland edges.