I converted a RBG to a raster then created a vector based on the values I wanted. The file looks good but there are some 'gaps' between the polygons. I tried the delete holes function but it doesn't seem to work for this. Ideas on how to fill the holes?
Tecnically, most of these gaps are not "holes": the only "hole" in the screenshot region is the one in the light-green feature on the left. All others are just areas which are not covered by any polygon.
Holes inside feature can be removed with the Delete hole tool which can be found under Processing-> Toolbox:
For the gaps, instead, you need to define which criteria to adopt.
For example: are the void "pixels" going to be filled in dark green or light green? based on what?
Given the specific input raster data, I would probably start with
Raster->Analysis->Proximity (Raster Distance)
possibly with these parameters:
(change "987" with a meaningful default value, like the one used for dark-green)
