Feature request #2536
ftools: Intersection and union don't produce a result
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Low | ||
| Assignee: |  cfarmer - | ||
| Category: | Python plugins | ||
| Pull Request or Patch supplied: | Resolution: | fixed | |
| Easy fix?: | No | Copied to github as #: | 12596 |
Description
1. open the attached shapes (both produced with ftools/buffer)
2. select ftools union/intersection
3. proceed the union or intersection process
4. message with bad geometries appears
=> no result
My system:
gdal-1.7.1
geos-3.1.0
QGIS -r13034
test.zip (11.8 KB)
add_warnings.diff 
- Proposed patch
(5.11 KB)
History
#1
Updated by dr - about 14 years ago
Confirmed. I've get the same problem on some of my layers.
Moreover if both merged layer's attribute tables have the same field's name, Union tool does not consider it. At result we have table with field names: NAME, NAME_1, NAME_2... It will be useful to merge such fields (with the same type and name) into one column.
#2
Updated by Alexander Bruy about 14 years ago
This is related with #2629. Also here is another problem: when field names trimmed and suffix added we will have duplicate names and get error when initialize shapefile writer. I found three tools with this problem: union, intersection, symmetrical difference
Patch to fix this problem (evaluate field name lenght, check for duplicates and display warning messages) attached
#3
Updated by cfarmer - almost 14 years ago
- Resolution set to fixed
- Status changed from Open to Closed
Patch applied in . Thanks to alexbruy!
Carson