I loaded a shapefile and I know it has different classes and subclasses. One can also see in the attribute-table. But on the screen it is only one layer and I cannot make out any option to make the different classes visible and to work with the single classes. I once had this problem already but I sadly can´t remember how I solved it.
Not sure if you layer/attribute table has the classification field/values within it or not. If so, follow the steps below to style the data based off the field/class values:
- Right click layer and select Properties
- Select Style tab, and from the top drop down select the Categorized option, under the Column drop pick the field that has the class/values, click the Classify button, and finally change the symbol and value if needed
there are two options depending on your aim
- If you only want to style the different classes, you have to choose the style as categorize and the column which classifies the data (for example
myclassor ìd`as in my image)
If you want to make any further spatial manipulations, I would suggest splitting the layer into the different classes.
Select the different classes inside the attribute table with
"my_class" = 'my_value'
- Save the selection as a new file with right click on layer -> "save as.." and then tick the save only selected feauters.