I have a dataset, in shapefile format, for agricultural land grades in England. It is divided into 7 categories in its attribute table. As the file is a large file and I only want a small section I want to select a rectangle out of it. This was done for all other layers with the select rectangle tool. However it seems to select the entire data when i try to select the small area.
Is there a way to cut the data down to this small area which is undefined in the attribute table???