I'm making a map for school GIS course coursework. We must use cartodiagram/chart for map and I have an idea to make a map, that shows lighthouses and their light sectors as pie chart. I have managed to extract data from large pdf and import it into QGis as csv.
In that table, I have described light sectors as (5+1)*8=48 values per lighthouse (5 colors + no light, for maximum of 8 sectors). Data starts from north and continues clockwise. In QGis, I can set that pie chart starts from up (north), but it lists sectors on chart counterclockwise and changes something else(?), so I need to flip all pie charts horizontally.
Other question, is it possible to add transparency/alpha channel to pie chart color. If it is possible, how could I achieve that, if not, what is then workaround? Currently, I'm using simply black as placeholder.
Final, but not important problem, how could I bring other layers front of charts? Setting diagram priority nor layer ordering didn't work.
P.S I'm non-native english using non-english QGis and computer, so some exact names of functions/objects might be wrong.
- How to add transparency to pie chart pie?
2. How to transform (flip) all charts at time? 3. How to change chart rendering order?
Edited to remove other questions. Pie transparency is most important for me currently.