[Qgis-user] clip still not working on osm shape

[Nicolas Cadieux]

By reproject the extent, you mean clip?


Envoyé de mon iPad

> Le 1 sept. 2016 à 12:42, Reginald Carlier [via OSGeo.org] <ml-node+s1560n5283595h6 at n6.nabble.com> a écrit :
> 
> Hi,
> 
>  
> 
> This procedure changes the CRS but the extent remains the same. The question is how to reproject the extent of the shape.
> 
>  
> 
> Thanks,
> 
>  
> 
> Reginald Carlier
> Deskundige GIS
> 
> 
> 
> 
> Gemeente Ingelmunster, Oostrozebekestraat 4, 8770 Ingelmunster 
> T +32 51 33 74 39 www.ingelmunster.be
> 
>      
> 
> Van: DelazJ [mailto:[hidden email]] 
> Verzonden: donderdag 1 september 2016 15:32
> Aan: Reginald Carlier
> CC: Nicolas Cadieux; [hidden email]
> Onderwerp: Re: [Qgis-user] clip still not working on osm shape
> 
>  
> 
> Hi,
> 
> Reginald, in QGIS, Layer menu --> Save As ... (or simply a right-click on the layer) helps you create a reproject the layer in another projection. This is an easy way you could (actually) change the crs of your layers. Once done, the clip process should have succeeded.
> 
> Changing the projection in the layer properties is not the way to do it.
> 
>  
> 
> 2016-09-01 14:35 GMT+02:00 Reginald Carlier <[hidden email]>:
> 
> Hi,
> 
>  
> 
> I found that the problem was the conversion of the CRS. When I select the shape of the town (Lambert 72) in QGIS Browser and choose WGS 84 as CRS the extent is still in Lambert coordinates. I tried the same in ArcMap and there I got the same result. Then I tried a function in the toolbox under Data Management > Projections and Transformations > Project where you can choose the CRS and also the transformation algorithm. Then the shape of the town was shown in the right spot. I wonder if there is such a tool in QGIS.
> 
>  
> 
> Regards,
> 
>  
> 
> Reginald Carlier
> Deskundige GIS
> 
> 
> 
> 
> Gemeente Ingelmunster, Oostrozebekestraat 4, 8770 Ingelmunster 
> T <a href="tel:%2B32%2051%2033%2074%2039" target="_blank">+32 51 33 74 39 www.ingelmunster.be
> 
>      
> 
> Van: Nicolas Cadieux [mailto:[hidden email]] 
> Verzonden: donderdag 1 september 2016 13:36
> Aan: Reginald Carlier
> Onderwerp: Re: clip still not working on osm shape
> 
>  
> 
> Hi,
> 
> Are you running the latest Qgis 2.16? If so, vector tool should be in the processing toolbox and not in the vector menu.  I have only worked one day with 2.16 but it was long enough to see that it needed a complete removal of all previous versions as the menu had a mixe of the old and the new version.  After that, vector tools disappeared from the vector menu and reappeared in the new processing menu.  I had read about this in a French blog so I was expecting it.  Could this be the cause of your problem?  
> 
>  
> 
> If not, make sure both layers are in the same CRS (like you did) but that they also align properly when the "CRS on the fly" is not activated.  Try loading only those two layers.  You could test to see if it's the osm file format that is giving you problems by testing the two .shp file.
> 
>  
> 
> Nicolas
> 
> 
> Envoyé de mon iPad
> 
> 
> Le 1 sept. 2016 à 05:33, Reginald Carlier <[hidden email]> a écrit :
> 
> Hi Nicolas,
> 
>  
> 
> I changed the CRS of the shapefiles so they match (EPSG 4326).
> 
> It takes about 30 seconds before the algorithm (Vector > Geoprocessing > Clippen) finisches.
> 
> Then it loads the resulting shapefile in QGIS but the attributetable is empty and the resulting shp is 1 kB.
> 
> It looks as the Clip function doesn’t work.
> 
>  
> 
> Regards,
> 
>  
> 
> Reginald Carlier
> Deskundige GIS
> 
> 
> 
> 
> Gemeente Ingelmunster, Oostrozebekestraat 4, 8770 Ingelmunster 
> T <a href="tel:%2B32%2051%2033%2074%2039" target="_blank">+32 51 33 74 39 www.ingelmunster.be
> 
>      
> 
> 
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