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

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1answer
375 views

Intersect between polygonal shapefiles error

I'm encountering a problem when I try to intersect two different shapefiles. They are all new shapefiles I created to descibe the land cover and the land use of a city. The problem occurs when I ...
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0answers
216 views

qgis html annotation - scale dependent rendering?

In the QGIS 2.2 map composer, I have a large map at a certain scale (let's say 1:25000) and an inset map that is an enlargement of part of the main map (let's say 1:12500). When adding html ...
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3answers
379 views

How to add columns with x/y data to Spatialite Layer? [closed]

I´m new here and I am also quite new at working with QGIS. My Spatialite Database looks like this (arch_locations.sqlite) Fields: pkuid short_ID name geometry I´d also like to have two additional ...
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1answer
98 views

Overlap or intersect two choropleth [closed]

I have two choropleth of the same area but with different concentration data and I need to overlap them. My aim is to highlight the areas of intersection between the points with the highest ...
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1answer
579 views

How to indicate flow of a watershed feature?

While tracing and digitizing rivers, streams, rivulets, etc., is it possible to indicate the direction/flow in the shapefile on QGIS? I'd like to avoid using map labels. Ideally, when done tracing, I ...
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1answer
191 views

Spatialite Table Difference in QGIS

I am see differences between tables when I view them in spatialite-gui and in QGIS. I have created a table, added columns, and updated the columns in spatialite-gui. Within spatialite-gui I can view ...
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1answer
205 views

Including two different maps in one QGIS Print Composer

How do I use print composer in QGIS 2.0.1 to produce a final product with two different maps on the same sheet? I can't figure out how to use the 'add a map' button to add anything other than a ...
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1answer
138 views

QGIS: Line to polygon conversion

Currently we are working in a geological project..in which all the Contacts, Linear & some other geological features have to be captured. The thing is most of the features have to be Captured as ...
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1answer
61 views

How to export a IDW raster while keeping the search radius data

I want to export my IDW rasters that I made in ArcGIS to QGIS, however when I export my raster, the values are there but are no longer displayed. They are stored within each cell and are not ...
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0answers
47 views

Problems with projections in QGIS 2.2 on a Windows Vista? [duplicate]

I use QGIS 2.2 on Windows 8, and the same QGIS 2.2 has been installed on a computer with Windows Vista. On the Windows 8 everything works just fine, but something is wrong on the Windows Vista. All ...
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1answer
3k views

MSSQL Connection settings for QGIS

OK first lets get the blond elements out of the way- I'm not asking for how I connect to my actual database. What I'm asking for is an example or screen shot of the entries required when setting up a ...
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1answer
142 views

Question about BNG coordinate systems

I'm historically a user of MapInfo Professional but have recently started using FME and have been talked into now testing out a copy of QGIS. The main problem I've come across is that the coordinate ...
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1answer
434 views

QGIS 2.2 Attribute Editor Layout “Drag and Drop designer” Field does not exist in datasource

I am experimenting with a new feature available since version 2.2 "Relations" where Foreign Key relations from a database can be documented, so that the QGIS UI can (auto) generate its Attribute Edito ...
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1answer
92 views

Create and immediately update field using Field Calculator

You can create fields and once created, populate them with data using the Field Calculator. But can you do both at the same time using an expression? Or must you do it in 2 steps?
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1answer
449 views

Adding attribute list to combobox in a python plugin

I am developing a simple plugin at the moment which contains 3 combo boxes: comboBox_1 comboBox_2 comboBox_3 Combobox 1 & 2 lists the vector layers available, however I would like the 3rd ...
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1answer
141 views

QGIS Custom Form: “Other” category in combo box replaced by line edit [closed]

I am trying to create a custom form for QGIS 2.0 with comboboxes containing an "other" category. I wonder how to provide a line edit to enter info replacing the "other" choice if chosen. Not sure if I ...
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1answer
711 views

Can't select layer in the Road Graph plugin QGIS

I'm trying to use the Road Graph plugin in QGIS 2.2.0. I have tried a few line shape files, but it won't let me select the layer (the option is greyed out). I've tried adding a 'SPEED' field and a ...
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1answer
495 views

QGIS Map tools and Map canvas--QString errors

I'm trying to learn more about using QGIS Map Canvas widgets and creating custom map tools, so the information from the PyQGIS cookbook is very helpful. After trying to experiment with mywnd.py from ...
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1answer
206 views

How to select and zoom in features from a QGIS Python Plugin

I'm very new to Python. I'm trying to find a way to select and zoom to the features from a QGIS layer. I've created a plugin and built a custom form. I have 3 values from the form which I need to ...
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1answer
419 views

QGIS loads PostGIS layers but DBManager can't connect

DB Manager can't connect to PostgreSQL, but "Add PostGIS Layer" can. My eventual goal is to save created layers to PostGIS. I assume I can do this using the DBManager Tool. I can alternatively use ...
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1answer
562 views

Editing WFS with max feature limit in QGis

I'm serving a large layer (500 thousand polygons) using Geoserver WFS and what to be able to edit it using QGis. I've set a feature limit on the layer so I wont overload GeoServer with the request. I ...
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4answers
682 views

How to change a CSV layer attribute value from text to number - once again?

i have read most of the related postings and answers allready ... (e.g. http://anitagraser.com/2011/03/07/how-to-specify-data-types-of-csv-columns-for-use-in-qgis/ and How to change a CSV layer ...
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0answers
305 views

QGIS 2.2 saving layer as CSV with GEOMETRY=AS_WKT not working

Just upgraded to QGIS 2.2 and it looks like saving a layer as CSV doesn't support GEOMETRY=AS_WKT anymore. The new Layer Options portion of the save dialog is cool but it looks like GEOMETRY and ...
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2answers
255 views

How can I add custom CRS with +proj=mercxx to QGIS 2.2.0 Valmiera?

i've builded a custom proj.4 library, tested it by command line (proj and cs2cs) and with postgres/postgis. All works fine. Now i'm trying to make the same with Qgis 2.2.0. I've replaced the original ...
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1answer
292 views

Adding MrSid to QGIS

I'm fairly new to QGIS and was hoping someone could help me load some MrSID photos into QGIS. I have read some posts and have installed the OSGEO4W Installer and selected the GDAL-MRSID Lib. I ...
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1answer
372 views

How to make GRASS and SAGA tools capable to use in QGIS?

As my title, I installed Qgis, GRASS and GDAL by osGeo4w package, and as I finish the installation, I want to use GRASS tool, I face this problem: But I already installed GRASS and SAGA, how to make ...
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0answers
94 views

Simplify by number of points in QGIS

I have a fairly simply question about something I just don't know how to do. I am aware you are able to simplify polygons in QGIS based on distance tolerance but my questions is, is there a way to ...
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1answer
166 views

How do i install QGIS with FileGDB?

Please help me i am very new at this and the last time I asked i was sent to a link about an older version of QGIS. I need to know how to install QGIS 2.0.1 for Windows 8 64 bit so it can recognize ...
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0answers
373 views

Distorted Google Maps layer in pdf export from QGIS 2.0.1

Export of a map from QGIS 2.0.1 Composer to pdf results in distortion (changed scale) of Google map layer. Why?
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0answers
154 views

Extending “How to add complex Emergency Symbology (TrueType fonts) to QGIS?”

I have used the technique as outlined in How to add complex Emergency Symbology (TrueType fonts) to QGIS? but have run into some difficulty. I have used this technique for a map of water assets that ...
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1answer
275 views

How to add a DEM Band to an existing 3-band TIFF file using QGIS?

I'm quite new in the GIS business and I do not figure out how to do the following thing: I have two geoTIFF Files, one is a 3+1 bands file (RGB+alpha), the second one is a DEM geoTIFF file containing ...
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2answers
457 views

Import Esri/ArcGIS .e00 files to QGIS on Linux (getting error message)?

I can't seem to import Esri .e00 files into QGIS, and I can't figure out why. I'm trying to import files I've downloaded from ...
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2answers
868 views

How can I create a merged buffer in QGIS then count points that fall within it

I have a QGIS plan which shows ponds (as points in a shape file with an OS tile as a background) within a survey area. I need to calculate the total number of ponds within 1 km of each of the on-site ...
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2answers
264 views

Saving a gml layer does not change coordinates

I am trying to export a gml layer to geojson with lat/lng as the preferred coordinate system. So what I did was a 'save as' on the layer with selected CRS: 'IGNF: WGS84G'. Now I was hoping it ...
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1answer
591 views

Arc ASCII Grid output problem in QGIS 2.0

I used to convert tif files to ascii in Qgis 1.8 using gdal translate without having any problems with the output i.e. I have the normal heading and values. When I upgraded to 2.0 I started to get the ...
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1answer
938 views

How does MMQGIS geocoding tool work?

Hi all and thanks for any help. I try geocoding locations from csv file in qgis using mmqgis with no success. is there a log file where i can see the error massages? lets use one of the record as an ...
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1answer
85 views

My Coordinate Reference System listing is in the wrong language

I just installed QGIS Desktop 2.0.1 on a desktop (Windows 8-64). All the menus are in English-US (as they should be), but the CRS listings -- when I try to change them for a project are a layer -- ...
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2answers
659 views

OSX 10.9 + QGIS 2.0.1 - Missing osgeo module

Running the following: QGIS 2.0.1 (via Kyngchaos) OSX 10.9 GDAL/OGR 1.10.1 (via Homebrew). Recently, I've become unable to use the OpenLayers plugin, which is complaining that I'm missing the ...
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1answer
235 views

Is there a way to automatically calculate attribute values for new features?

I am creating a vector point layer which will be added to over time. I have been using the field calculator to populate fields such as X and Y coordinates. I'm wondering if there is a way to have ...
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1answer
361 views

How to define correctly the Grass region in Qgis

I know that my question could be pretty basic for some of you. I am trying to learn GRASS. I have some raster layers and a vector file in EPSG 32614. Using the grass plugin I defined a new map set, ...
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0answers
184 views

Touch up tool for rasters?

I was wondering if it were at all possible to manipulate/massage rasters (eg Geotiff) using Qgis plugins or Grass?? By manipulate, I mean manually smooth off interpolation artefacts, blended surface ...
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2answers
251 views

No prj file output from qgis:reproject

I'm trying to reproject a vector layer using the 'qgis:reproject' algorithm in the processing/sextante module of QGIS, from Python. This kind of works, but the .prj and .qpj files created after ...
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1answer
308 views

How can I get the plugin manager “get more” icon?

I am fairly new to QGIS and i was looking to add more plugins to the core provided in version 2.0 I read the user manual provided by QGIS and found out that there should be an icon "get more" ...
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1answer
1k views

Having trouble connecting QGIS with postgres database with postgis extension [closed]

I am working on Ubuntu Precise with postgresql version 9.3 and postgis 2.0. After initially starting my postgres database and eventually getting permission errors that would prevent postgres from ...
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3answers
577 views

Add Oracle Spatial Vector Layer with QGIS 2.0 on Mac OSx

I installed version 2.0 using the recommended mac installer (http://www.kyngchaos.com/software/qgis), and the installation went fine, but there is no option to add an oracle spatial layer (not in the ...
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1answer
223 views

Buttons (Ok, Cancel) disappear in “Apri Modulo” from Attribute Table in QGIS 2.0.1

QGIS 2.0 has changed the visualisation of a form opened from the attribute table: instead of opening the form in a separate window, the form is opened in the same one. This is not a problem, but all ...
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1answer
511 views

How to use UUID Generator in Qgis 2

I try to generate a UUID (edit widget) for a vector shapefile in qgis 2 but the field value is always NULL. Does the field requirea specific datatype? I used integer. In the manual I found the info ...
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1answer
673 views

How to sum up multiple columns values into one single column

I have one table containing many columns. Using field calculator, I want to create a new column containing (for each line) the sum of all columns values. Pretty dumb, but just cannot find the correct ...
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1answer
147 views

How do I install mdenoise in GRASS?

How do I install mdenoise in GRASS 6.4.3? I've already successfully installed r.denoise, and have downloaded mdenoise from wget http://www.cs.cf.ac.uk/meshfiltering/index_files/Doc/mdsource.zip. How ...
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1answer
544 views

How to export a geojson file with correct order of coordinates?

I was testing rendering of data via GitHub in geojson format, because I wanted to use it for INSPIRE data. INSPIRE data are in GML 3.2.1 format. I've downloaded one of datasets from ...