Re: [Qgis-user] How to force exact/korrekt editing polygon layer, (topological)

2017-01-11 Thread Árni Geirsson 
I would add that by styling the polygons with a semi-transparent fill,
inadvertent overlaps become quite visible.

Arni


Árni Geirsson
*Alta ehf* // +354 582 5000 // +354 897 9549

On 11 January 2017 at 08:47, Bernhard Ströbl 
wrote:

> Hi Bernd,
>
> QGIS can prevent gaps/intersections between polygons of the same layer,
> you only have to switch on the options. IMHO QGIS should not always prevent
> this because e.g. users may deliberately leave gaps.
>
> So how can you solve your problem?
> 1) You could teach your users what the options mean and how to use them (I
> regularly teach my users).
> 2) You could further prepare a project for them where the snapping options
> are enabled for the layers in question. If you are in PostGIS create a new
> DB user that has full rights on these tables and load the layers with this
> user account, revoke all editing rights from all other DB users. Thus your
> QGIS users can only edit when they use your prepared project. Be aware that
> QGIS stores username and password in the project file, but I would not see
> a problem in this if your users are as dumb as you claim :-)
> 3) If on PostGIS you could enable triggers on insert/update that does not
> accept invalid polygons/overlaps between polygons. No way to prevent gaps
> during editing; gaps must be identified end eliminated afterwards.
> (4) I have never tried PostGIS' new topology. Maybe it is worth checking
> it out.
>
> Bernhard
>
> Am 11.01.2017 um 09:24 schrieb Bernd Laskowski:
>
>> Hi Jürgen, what about dumbest assumable user  or lusers?
>>
>> Thanks a lot Harrissou
>> but I know the standard options to use topological editing funktions.
>> I have problems with foolish users. They forget to activat topological
>> editing or snap-option and so on.
>> We need a solution to prevent saving intersections or/and holes/gaps
>> within qgis or postgis.
>>
>> Regards
>> Bernd
>>
>>
>>
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Re: [Qgis-user] How to force exact/korrekt editing polygon layer, (topological)

2017-01-11 Thread Bernhard Ströbl 

Hi Bernd,

QGIS can prevent gaps/intersections between polygons of the same layer, 
you only have to switch on the options. IMHO QGIS should not always 
prevent this because e.g. users may deliberately leave gaps.


So how can you solve your problem?
1) You could teach your users what the options mean and how to use them 
(I regularly teach my users).
2) You could further prepare a project for them where the snapping 
options are enabled for the layers in question. If you are in PostGIS 
create a new DB user that has full rights on these tables and load the 
layers with this user account, revoke all editing rights from all other 
DB users. Thus your QGIS users can only edit when they use your prepared 
project. Be aware that QGIS stores username and password in the project 
file, but I would not see a problem in this if your users are as dumb as 
you claim :-)
3) If on PostGIS you could enable triggers on insert/update that does 
not accept invalid polygons/overlaps between polygons. No way to prevent 
gaps during editing; gaps must be identified end eliminated afterwards.
(4) I have never tried PostGIS' new topology. Maybe it is worth checking 
it out.


Bernhard

Am 11.01.2017 um 09:24 schrieb Bernd Laskowski:

Hi Jürgen, what about dumbest assumable user  or lusers?

Thanks a lot Harrissou
but I know the standard options to use topological editing funktions.
I have problems with foolish users. They forget to activat topological
editing or snap-option and so on.
We need a solution to prevent saving intersections or/and holes/gaps
within qgis or postgis.

Regards
Bernd



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Re: [Qgis-user] How to force exact/korrekt editing polygon layer, (topological)

2017-01-11 Thread Bernd Laskowski 

Hi Jürgen, what about dumbest assumable user  or lusers?

Thanks a lot Harrissou
but I know the standard options to use topological editing funktions.
I have problems with foolish users. They forget to activat topological 
editing or snap-option and so on.
We need a solution to prevent saving intersections or/and holes/gaps 
within qgis or postgis.


Regards
Bernd

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Re: [Qgis-user] How to force exact/korrekt editing polygon layer (topological)

2017-01-10 Thread DelazJ 
Hi,
Thanks Jürgen, it helps a lot :)
Bernd, you may need to read
http://docs.qgis.org/2.14/de/docs/user_manual/working_with_vector/editing_geometry_attributes.html

Regards,
Harrissou

2017-01-10 13:39 GMT+01:00 Jürgen E. Fischer :

> Hi,
>
> On Tue, 10. Jan 2017 at 13:18:24 +0100, Bernd Laskowski wrote:
> > while editing by DAU
>
> In case you're wondering:  DAU is a german abbrevation for "dümmster
> anzunehmender User" [0], ie. most foolish user.
>
>
> Jürgen
>
> [0] https://de.wikipedia.org/wiki/D%C3%BCmmster_anzunehmender_User
>
> --
> Jürgen E. Fischer   norBIT GmbH Tel.
> +49-4931-918175-31
> Dipl.-Inf. (FH) Rheinstraße 13  Fax.
> +49-4931-918175-50
> Software Engineer   D-26506 Norden
> http://www.norbit.de
>
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Re: [Qgis-user] How to force exact/korrekt editing polygon layer (topological)

2017-01-10 Thread Jürgen E . Fischer 
Hi,

On Tue, 10. Jan 2017 at 13:18:24 +0100, Bernd Laskowski wrote:
> while editing by DAU

In case you're wondering:  DAU is a german abbrevation for "dümmster
anzunehmender User" [0], ie. most foolish user.


Jürgen

[0] https://de.wikipedia.org/wiki/D%C3%BCmmster_anzunehmender_User

-- 
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Dipl.-Inf. (FH) Rheinstraße 13  Fax. +49-4931-918175-50
Software Engineer   D-26506 Norden http://www.norbit.de


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