25 Process Vector: Dissolve (and more?)

Let’s start the “Process Vector” section with a question, continue using the “NLCD2021_polygon”  layer.

As we can see, there are multiple polygons of the same LULC. After reviewing the information in the attribute table, however, I am questioning the purpose of so many rows of the table with redundant information. This table also occupies storage space on my computer, resulting in slower processing times! Considering the purpose of this geoprocessing, estimating the land cover status in Monroe County, do we need all the tiny segmentations of polygons? The answer is “NO!”

The Dissolve is a one-layer vector processing tool that combines multiple features into a single polygon based on specified attributes. In this case, we will dissolve the NLCD2021_polygon with land cover types.

1. In the Geoprocessing, search Dissolve and fill in the parameters like