[Qgis-user] Clip polygon by raster
Dear QGIS users, I would like to ask how to clip a polygon using a raster layer? basically, I have a raster layer and I want to use it as a clip layer to my vector layer. Thanks, -Leo ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Clip polygon by raster
Hi Leo, If you install the Processing plugin, you will find a clip tool for vector layers in the toolbox. You can also use ogr2ogr option --clipsrc (http://www.gdal.org/ogr2ogr.html)... command line rcoks :) Cheers, V. On 08/10/2014 09:46, Leo Kris Palao wrote: Dear QGIS users, I would like to ask how to clip a polygon using a raster layer? basically, I have a raster layer and I want to use it as a clip layer to my vector layer. Thanks, -Leo ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] NoData
hi all! please, is there someone who could explain properly all the NoData topic? I mean: 1. differences in setting negative values (-999, -, -3.40282e +35, etc) VS NoData (Nan, NoData, NULL) 2. how QGIS handles it 3. best practices or good hints for managing them sorry but I've quite a big confusion. Thank you very much in advance! Nic ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Zoom does not go smaller than 1:2.256
I have the same problem. -- View this message in context: http://osgeo-org.1560.x6.nabble.com/Zoom-does-not-go-smaller-than-1-2-256-tp5166440p5166454.html Sent from the Quantum GIS - User mailing list archive at Nabble.com. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Export WKT using specified projection
With country border data from NaturalEarth, I'm using Ctrl-C to copy a selected country and paste it into a text editor in WKT format. However, I can't find a way to make this use a specific projection. So far the only way I've found to get the result I need is to first export a shape file using the desired projection, then reimport the file I've just exported and copy/paste that. Is there an easier way? ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] Copying / pasting polygons between layers?
Hello everyone! if I have two layers of polygons and would like to copy a polygon from one to another, what would be the best way? I have used the copy / paste but the polygon is being glued to their fields with the null value, even when some fields are already filled. -- Luciano Ping! ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] How to calculate the transformation parameters for the QGIS Affine Plugin
Hallo Marcel, have you tried to run the grass command v.transform with point file from the Processing Panel? In this way you do not need to calculate the parameters, and you can use it for batch processing too. You still need more than two points with known coordinates. ciao Sebastiano - -- Deutsches Archäologisches Institut | Orient-Abteilung TAYMA Project -- View this message in context: http://osgeo-org.1560.x6.nabble.com/How-to-calculate-the-transformation-parameters-for-the-QGIS-Affine-Plugin-tp5166345p5166493.html Sent from the Quantum GIS - User mailing list archive at Nabble.com. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] QGIS and Oracle Views
Hi List, I'm trying to get QGIS to connect to an Oracle View but as best I can tell QGIS is requiring a Primary key. The problem is that I don't believe Oracle formally supports these for views, only base tables or materialised views, and creating one isn't necessarily that easy. Is it possible for QGIS to use Views without this restriction? Thanks, Jonathan HR Wallingford and its subsidiaries uses faxes and emails for confidential and legally privileged business communications. They do not of themselves create legal commitments. Disclosure to parties other than addressees requires our specific consent. We are not liable for unauthorised disclosures nor reliance upon them. If you have received this message in error please advise us immediately and destroy all copies of it. HR Wallingford Limited Howbery Park, Wallingford, Oxfordshire, OX10 8BA, United Kingdom Registered in England No. 02562099 ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Copying / pasting polygons between layers?
Am 08.10.2014 17:56, schrieb Luciano: thanks ... and copying between layers of points. Why can not perform the copy / paste? because whenever I take the following error: ogr error ... Can you report the full error message? It works for me usually. Some data formats are not writeable, so try shapefile or sqlite database. HTH, André Joost ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
