[Qgis-user] Problems with clipper and snappin options

[Lene Fischer]

Hi Mariana,
You might have in invalid geometry.
One of your polygon have a selfintersection.

Try to control your polygons with the topologychecker.

Vector>Topologychecker>Configure
Choose the layer >Choose ‘Must not have invalid geometries’
Click Add Rule
Click Show Errors
Click Validate All

https://www.youtube.com/watch?v=_GK2ll_TcQo

Regards
Lene Fischer


Fra: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] På vegne af Mariana Buzzi
Sendt: 19. januar 2016 04:29
Til: Ramon Andiñach
Cc: qgis-user at lists.osgeo.org
Emne: Re: [Qgis-user] Problems with clipper and snappin options


Hi Ramon!
I check to the CRS and this is right!i can't use the clip option,may be is because I did the mask with the option raster to vectorial. I don't know!!!!what can I do?
I can do the advance digital!!!!
Thanks so much!!!!
Regards
Mariana
El 18/01/2016 03:44, "Ramon Andiñach" <custard at westnet.com.au<mailto:custard at westnet.com.au>> escribió:
Hi,
I think the listsever has (deliberately) dropped your images.

Two suggestions:
1. Can you check and make sure that both your layers have the same CRS?
If they aren't your first move should be to save one of the layers  so they have the same CRS.

2. On the snapping settings, change the snapping mode to "Advanced" (Avanzado?). This allows you to set options for individual layers.

Hope this helps.

-ramon.

> On 18 Jan 2016, at 13:17, Mariana Buzzi <marianabuzzi86 at gmail.com<mailto:marianabuzzi86 at gmail.com>> wrote:
>
> Good night people!
> I'm making masks that correspond to landscape units (LU). The polygon corresponds to the LU called pampas. This polygon was done through the creation of a vector and scanned with mouse function of landscape features shape. As you can see, my first problem emerges at that I can not cut the pampa (light blue) with clipper program.
> The second problem arises with me snnapping options. I need to do two polygons .. rudimentary scanning did not want to, but I wanted to use the snapping options so that the edges are accurate. But I could not.
>
> I hope you can help me.
> Thank you.
> A big hello from Patagonia.
> Mariana
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