[Qgis-user] Cutting lines with a polygon boundary

[Zoltan Szecsei]

On 2015/01/25 20:23, Andre Joost wrote:
> Am 25.01.2015 um 13:51 schrieb Zoltan Szecsei:
>
>>
>>
>> So, does anyone know of a way to efficiently cut features in multiple
>> layers using a polygon, and then to be able to select the pieces
>> (multiple layers) that are either inside or outside the polygon, and
>> then delete them?
>>
>
> Disregarding the "multiple":
>
> "Vector -> Geoprocessing -> Clip" deletes the items outside the polygon
Nope, doesn't. - In my first point I said: */Vector Geometry Processing 
Clip, but it wants to extract the data inside the polygon and create a 
new file with the extracted data. (To be expected)
/*but meant: */Vector-> GeoProcessingTools-> Clip, but..... /*(my bad, 
apologies)*/
/*It does not delete, it clips them out into a new layer/- which is not 
what I'm hoping to achieve./*/
/*
Thanks for the thought anyway, though.
Regards,
Zoltan*/
/*
> "Vector -> Geoprocessing -> Difference" deletes the items inside the 
> polygon
>
> You would have to do it for every layer you want to be cut, the 
> dialogue box will stay open after cutting. If the polygon layer 
> contains just one polygon, no selecting is necessary.
>
> BTW: make sure all layers share the same CRS (i.e. turn 
> on-the-fly-reprojection off)
>
> HTH,
> André Joost
>
>
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Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
GIS and Photogrammetric Services

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