I'm not sure exactly what I am asking, probably lending to my struggle to figure it out via google.
I have a large polygon layer from OpenStreetMap data (openstreetmap.org). My problem is I need to reduce/generalize the fields/attributes in that layer largely due to inconsistencies in classifications from different people adding to it.
For example, I have the value field "leisure" with polygons labeled "garden", "golf course", etc. I have another value field with polygons/attributes "grass", "meadow", etc.
Is there a way to create a new value field or separate polygon layer with all these polygons labeled as "greenspace"?
I am still struggling to figure out how to use the field calculator to do what I am looking for. I think my hang up is that I am trying to combine polygons of different "attributes" within different field types (attaching image to original post for clarification). Is there a way to combine polygons of several values (not fields) from different fields into one field?