Generate a geopackage with a layer called study_area_bboxes which is the grid align bbox for each part of the study area.
layer study_area bbox which covers all selected polygons for the analysis boundary layer with extents a factor of 100m apart
layer study_area_bboxes which is a bbox for each polygon part used in the analysis. This must be grid aligned to the study_area and snap up on the outer extents so that it does not clip any feature.
raster masks, one per polygon part that is a 100m cell sized land-only bit grid for the polygon part.
Generate a geopackage with a layer called study_area_bboxes which is the grid align bbox for each part of the study area.