In QGIS 2.14 I have a polygon shapefile with thousands of entities (=row) and > 10 attribute column.
A lot of these polygons share the exact same attributes, in fact there is only 12 different types of polygons.
I want to regroup all polygons with sames attributes in only one (so I just want to have 12 entities at the end and keep all the attribute data).
I have tried lots of options "regroup", "dissolve", "dissolve by attribute", etc... but each time one of these issues occurs :
- I lost lot of columns (just keeping 1 or 2/3);
- I got just one entity;
- Some polygons "disappear"
The closest I found was SAGA "Dissolve", but it don't process on all polygons.