2

I am creating a model that will create a viewshed and a buffer around an observer layer /point. I want to use a field in the observer layer for the buffer range.

I tried the option 'Field type'. But it won't let me select anything. Probably because the system does not know what to select.

Furthermore, I tried a 'Vector Field' as input. And pre-calculated value. The model then generates no matter what a 10m buffer.

How can I create a model where I'm able to select the column name of the buffer range?

EDIT: Added the graph with the solution.

enter image description here

Below is the model.

At the distance field I want a model input

1

If you want to use a field of the attribute table for buffering, you can choose buffer by variable distance as the tool you're using, this allows you to write down the field name.

Or when using the plain buffer tool as you currently do, you can click data defined override (as you already did in your second screenshot) and then click edit. Enter here the field name and confirm.

4
  • Erik, the first solution works. At the distance field, I selected '@obsserverlayer'. Now it uses the correct radius. But what if I have more than 1 column with integers? The best case scenario is when a user has the option to choose the radius column. – BearHunt Feb 24 at 9:13
  • Disregard the first comment. I got it. I used a 'Vector Field' as input. Here the users can select the radius column. This field is the input for the variable distance buffer. See 3th screenshot. – BearHunt Feb 24 at 9:22
  • There is no third screenshot @BearHunt – Erik Feb 24 at 9:25
  • I was still editing. Now there is a third screenshot – BearHunt Feb 24 at 9:27

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.