[Qgis-developer] Geometry Checker contra Topology Checker

Luigi Pirelli luipir at gmail.com
Thu Jan 14 04:48:24 PST 2016


today someone asked me where to invest public development funds
enhancing some topology check instruments (not necessarily QGIS)

they have the doubt about if was better invest in Topology Checher or
Geometry Checker (or something else)

would make sense to invest merging the two plugins, new geometry
engine for Geometry Checker with the UI and use cases of the Topology

Luigi Pirelli

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On 8 October 2015 at 16:23, Sandro Mani <manisandro at gmail.com> wrote:
> On 08.10.2015 16:19, Giovanni Manghi wrote:
>>>>> We also should move the first one to the analysis library, so that the
>>>>> routines are accessible by plugins and processing framework.... Just
>>>>> another item on the TODO list!
>>>> sure, big improvement. better opening a ticket?
>>>> Giovanni, could you please add tickets for the missing features of the
>>>> new plugin, and one for the removal of previous plugins?
>>>> all the best, and thanks.
>>> I must say that I like more the concept of rules in Topology Checker
>>> instead of one big dialog used in Geometry Checker. Both from UI and
>>> programming point of view. It is more flexible and extensible. I am
>>> curious why a new plugin was started instead of improvement of the old
>>> one. I don't think that the Topology Checker should be simply removed
>>> until we have something similar in terms of definition and
>>> implementation of rules.
>> Hi, I haven't suggested to remove immediately the topology checker,
>> but just said that the redundancy with the python geometry checker and
>> now with the new geometry checker is very puzzling for final users, so
>> one way or another we should get rid of it (the redundancy).
>> Moreover the new tool can fix geometries, and this is of course a
>> must. All the mentioned tools have issues: the topology checker with
>> reprojected layers and false positives in particular but also the new
>> geometry checker has a few ones, see for example
>> http://hub.qgis.org/issues/13535
> Yep - as mentioned in the original PR, the port to the new geometry core is
> pretty fresh and it didn't get as much testing as our previous version based
> on the old geometry core. So any error reports are welcome, I'll look at
> fixing any outstanding issues.
> Thanks
> Sandro
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