QGIS is a user-friendly, cross-platform GIS application licensed under the GNU General Public License.

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0answers
40 views

Reprojecting a population raster from LAEA to lonlat

I have a population density raster from the EEA which is based on the CORINE land cover 2000 data. ...
2
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1answer
30 views

QGIS Change treeview categories in browser(2) panel

The main categories of the treeview in the browser panel seem to be hard coded. Is it possible to 1.) add, delete or rename categories (e.g. instead of "Project home" name it "Data") 2.) link ...
1
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0answers
29 views

QGIS and GRASS r.fill.dir processing times

I am new to the open source software and have performed analysis in ArcGIS in the past. I am learning as I go on this processes for OS. I am trying to calculate stream order (strahler) on a 1 gig ...
1
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0answers
28 views

Use QGIS as API [closed]

I would like to develop a simple application to use raster and map from a server. Is it possible to use QGIS as API to display map and raster? I also know that QGIS use API and library like ...
1
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0answers
22 views

QGIS polygon - filling a polygon gap

I do not use Python, I'm afraid. I need to fill in a polygon gap for this map of Scotland. Here is the gap: How do I fill in this gap? I have already tried drawing another polygon inside the gap ...
2
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1answer
23 views

How to display variable number of images associated with one point on QGIS

I have a set of point locations. I have a set of images with reference numbers. I'd like a way to easily see the images associated with the location, using QGIS. This is for my own use rather than ...
1
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0answers
21 views

QGIS Processing modeller fails when running field calculator

I have a problem running a model that I use to create columns with the coordinates for the start and end points of a line. This model used to work but now the model gives me this error :Algorithm ...
1
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1answer
30 views

Is it possible to print one item legend item in italic in print composer?

Is it possible to have one item in italic font (species names) and the rest in "normal"? I use QGIS 2.6. The legend consists of two items which should be written normal (trap positions and ...
1
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1answer
55 views

Load the raster image which is in TIF format using QGIS API

I am quite new inthe field of GIS. I am interested in is to load the raster image which is in TIF format using QGIS API I have followed the steps given the in the follwing link to load shape file ...
1
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1answer
57 views

QGIS 2.6.1 Brighton/ Grass pluggin r.stream.xxxx

I just updated my OSGeo4W and now have QGIS 2.6.1 and GRASS 6.4.4 and am trying to get strahler stream order. I am figuring out GRASS 6.4.4 GUI by itself but GRASS is easier withing QGIS, however, I ...
0
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0answers
9 views

QGis crash when open georeferencer generated image

I'm trying to georeference an image with the georeferencer, QGis creates the geotiff, I can open in other image viewers but when I try to open in QGis it crashes. A friend tested in arcgis and it ...
1
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2answers
36 views

Free solution for an intranet geodatabase for point data, connectable to QGIS / MapInfo

I have a plenty of point measurements - thousands of points with date/time, gps, measured values etc. I would like to make it possible to put all my particular datasets (can decide whether shp or ...
1
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0answers
21 views

Update WFS Layer with QGIS - Commit errors

In QGis: Importing WFS Layer from Server, changing Attributes, trying to save. I get Commit errors: Could not commit changes to layer ah_neu:mylayer. The geoservers logfile says: 2015-01-21 ...
2
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1answer
32 views

QGIS 2.4 graphical modeler add field: error executing algorithm

I have to add more than 20 fields to a lot of shapefiles. I used to do it with the tablemanager plugin. Beside it is time consuming, misstakes can be made. So I want to automate that procedure ...
3
votes
1answer
105 views

How to create a missing dbf file for shapefile?

I have a shape file (shp) which is missing its dbf. I tried to load this into Postgis using shp2pgsql and got the could not open shapename.dbf error. I opened it in QGIS, without issue, and ...
1
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1answer
28 views

How to zoom to selected feature with QGIS Python Console

I want to select a feature by ID and zoom to it. I tried the following but the canvas doesn't change. Any ideas? canvas = qgis.utils.iface.mapCanvas() cLayer = canvas.currentLayer() cLayer.select(51) ...
0
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0answers
12 views

How to get background maps to show in QGIS Cloud mobile version?

we're a group in Denmark, trying to publish some maps for use on a mobile device, but although our background maps show up in the desktop version, we can't get the mobile version to show them - What ...
2
votes
1answer
67 views

Export several files at the same time in QGIS

I have a lot of .TAB files open in QGIS and I want to save them to .SHP so I can work with them in ArcMap. Is there a way to save/export all these files at the same time or do I really have to "save ...
1
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1answer
23 views

Couldn't load plugin PRISM due an error when calling its classFactory() method in QGIS1.8 inWin8

When I load a plugin in QGIS ,met some problems : I had tried copy other Python27's files to QGIS's Python 27 file but it still does't work. Couldn't load plugin PRISM due an error when calling ...
1
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0answers
42 views

Create polygons enclosing same number of points on PostGIS

I have a geodatabase on Postgis with points representing customers, what i need is give a number of customers, lets say 100 and it need to generate polygons enclosing 100 clients each one. I only ...
6
votes
1answer
71 views

Why the order of imports matters in a standalone PyQGIS processing script?

I've come across a weird issue while running standalone PyQGIS processing scripts. The order of imports in the script affects its normal execution. You can reproduce the problem by opening a Python ...
1
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0answers
25 views

QGIS Interpolation on Curved Grid (River DEMs)

Hi QGIS experts out there, I have an very hard task I want to do in QGIS (or another open source GIS program). I have point data for river bathymetry (depth). I have been creating digital elevation ...
2
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0answers
36 views

Is there a QGIS alternative for ArcMap's Append (to Shapefile) Data management tool?

Is there something out there for QGIS that is similar to the Append Tool in ArcMap? Reason I am looking: I am currently working on a storm drainage project that involves GPSing Storm drain lids. My ...
2
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1answer
35 views

GRASS plugin absent from QGIS 2.6 OSGeo4W install

I've just installed QGIS 2.6 Brighton using the OSGeo4W installation. The GRASS toolbox plugin has not, however installed as it had been with previous versions. Before, I was able to access the GRASS ...
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0answers
17 views

gdal_polygonize floating values [duplicate]

gdal_polygonize converts whatever rasters values into vector integers as it is based on the GDALPolygonize() function (http://gdal.org/gdal__alg_8h.html#a3f522a9035d3512b5d414fb4752671b1). It is ...
4
votes
1answer
38 views

How can I open a GDB on QGIS for Mac?

I'm trying to open a GDB on QGIS for Mac but having no luck. Details: I'm currently running OS 10.9.3 on my laptop. I downloaded and installed QGIS 2.6.1-2 from KyngChaos I installed the GDAL ...
0
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0answers
16 views

Loading Oracle Spatial Layers in standalone python qgis

I used below script to connect to postgres and load layers successfully.I want to aceive this using Oracle Spatial for both vector and raster loading.How can I achieve that?In other words what is the ...
3
votes
1answer
61 views

How do you add North Arrow which adjusts to th map rotation in QGIS?

How do you add a working North Arrow into QGIS. One that will rotate if the map is rotated? I'm aware that in QGIS the North Arrow icon is just an image (Layout->Add Image/Arrow), what I need to know ...
1
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0answers
19 views

get the ogr_SDE.dll from the MapServer

can please some one give help to get the ogr_SDE.dll from http://www.maptools.org/ms4w/index.phtml?page=home.html I will connect the ArcSDE to my QGis, like that intruction ...
4
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6answers
223 views

How do I make a SHP file from waypoints?

I have a Garmin etrex 20 and I want to convert my waypoints into a shapefile for QGIS. The waypoints need their name and background information with them in the shapefile.
1
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2answers
28 views

How can I disable logs being created in standalone python script?

When I run the following script in QGIS 2.6.1, it produces a folder called 'processing', which contains a log, in the directory it reads files from. And since the script reads files from several ...
2
votes
1answer
23 views

Where is the OSGeo4W setup for QGIS 2.6.1?

The downloads site for QGIS appears to only contain standalone installers. I want to install QGIS 2.6.1 using the OSGeo4W Network Installer (64 bit). When I do this currently, I install QGIS 2.7 which ...
4
votes
1answer
46 views

Is there a way to split polygons by several lines in QGIS?

I have a polygon (.shp) and a line (.shp) layer. I want to split the polygon in several pieces along the lines that overlap the polygon. Afterwards I want to edit each polygon separately (attribute ...
2
votes
0answers
47 views

How to modify current QGIS canvas from python script?

I want to zoom into the current active QGIS canvas from a standalone python script. I tried the following but it doesn't impact the current QGIS canvas: import qgis.utils canvas = ...
2
votes
0answers
18 views

Isolation and interpretation of vineyard multispectral data

I have 3 band multispectral raster imagery over a vineyard from which i have created a number of indices e.g. NDVI. The data is fairly high resolution (5cm/pixel) so shows a lot of along vine and ...
0
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0answers
14 views

Can't open pdf hyperlink with Identify Tool in WMS?

I'm trying to open a PDF hyperlink in WMS Layer but when i click on hyperlink it opens a blank new window called qgis-bin. If i put that direction in a web browser it downloads pdf file without ...
1
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1answer
27 views

How to Add Oracle Spatial Tables to QGIS?

I've been playing qith QGIS Chugiak (2.4.0). I've been attempting to try to add Oracle Spatial tables (point, line and polygon feature classes) to desktop. The same tables I use in ArcGIS. I've ...
0
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0answers
35 views

Query does not work on joined file

Using QGIS 2.6.1 Brighton on an IMac (10.8.5). QGIS 1.8 Lisboa with exactly the same two vector shapefiles and the same CSV file works. I joined the file containing the polygons showing the features ...
1
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1answer
17 views

“Create Random Points” does not accept integer column as “value from input field”

Using QGIS 2.6.1-Brighton in Ubuntu 14.04 I have a polygon layer loaded from a PostGIS query with int4 values that range from 0 to 3000. When I try using the Random Points tool on this layer, none of ...
3
votes
1answer
52 views

Add a single column to multiple SHP

I was looking for a way to add a new column to several shp (simple polygons) at the same time. I don't know much about batch command. This new attribute is also a little bit tricky : I need to ...
2
votes
1answer
52 views

How to get shapefile extent from standalone script?

I am trying to obtain the extent of a polygon in a shapefile. I am running a standalone script which will create a grid based on the extent of the polygon. I have tried 2 methods: one from the ...
1
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1answer
29 views

QGIS virtual raster - insufficient permissions

I'm trying to create a virtual raster in QGIS 2.6.1 64b on Windows, but I get the message: "The process failed to start. Either the invoked program is missing, or you may have insufficient ...
2
votes
1answer
31 views

Building a python plugin on qgiq 2.6.0

Plz I need help, Im about creating a python plugin for my project , I already compiled it but Im now facing a real problem while the installation , it seems to me that there is issue about the ...
3
votes
1answer
36 views

How to add a column/feature with PyQGIS 2.x?

I'm using PyQgis 2.2 and I'm creating a plugin. I want to add one feature/column to a shapefile. But I get error.. I've tried to do this as it's shown in Cookbook: if caps & ...
2
votes
1answer
26 views

How to copy paste layers from one QGIS project to another?

Using QGIS 2.4, how can I copy one or more layers (with its properties, style, and the path of the source data) on QGIS and paste it in a different .QGS project? I tried to make this, clicking in a ...
3
votes
1answer
53 views

Removing a vector layer from QGIS [duplicate]

Considering my program is generating a shapefile that has to be added to the "Layers" tab in QGIS interface. However, once the utility of the layer is completed, I need to remove the layer in the ...
1
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1answer
21 views

Keep selection order when Copy & Paste From Attribute Table in Qgis

When copying some selected points listed in the Attribute Table from QGis to Excel the order seems to get lost. Is there a way to keep the selected points in the order they were originally selected? ...
0
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0answers
15 views

Is there a Minimum Cut Network Delineation Package in QGIS?

Currently I am working out how to best subdivide a pipe network into respective areas. One of the best ways to delineate this network is to subdivide the region into strongly connected areas such that ...
0
votes
0answers
31 views

qgis python error mac yosemite

This problem started when I installed GRASS. I changed one environment variable and then I tried fixing, then I uninstalled egis, grass gdal, then I upgraded to Yosemite, and I still have the ...
3
votes
1answer
32 views

NDVI from ESA's Sentinel-2 training data

I'am trying to generate an NDVI map using ESA's Sentinel-2 training images, which can be found at http://spirit.cnes.fr/take5. I tried using QGIS's raster calculator to create the NDVI image, however ...