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

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PyQGIS 2.4 - Make serial maps from template

I have developed a stand-alone python script for making serial maps using PyQGIS library. The maps should follow a specific format that is indicated by a template .qpt file. This template file is ...
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1answer
10 views

PyQGIS. How to Raster Layer checked status change?

I make plugin with use QListWidget. Items of QListWidget is Raster Layer name. When selected items, same name layer checked status changing. current my code is items = ...
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1answer
24 views

Structural geology symbols for QGIS?

are there any structural-geology symbols libraries (and geology in general) for QGIS? Many thanks
2
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1answer
25 views

QGIS 2.4 access .mdb add error

So I followed the instruction here: Can QGIS read an ODBC connection? for adding a .mdb into QGIS. There are great instructions about 1/3 of the way down. But I still can't get it to open. I on ...
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15 views

Merge vector layers to fill gaps in QGIS

I have a zip code map which I added per zip code data too (a regional director for each zipcode), and then dissolved the map based on the director attribute. As you may or may not know, zip codes are ...
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9 views

Correct folders and conf settings for qgis-web-client with qgis-server?

I have setup QGIS server using this guide sucessfully and would now like to setup qgis-web-client alongside it. My QGIS server folder is: /usr/lib/cgi-bin For qgis-web-client I have followed the ...
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0answers
13 views

Chinese characters appear in attribute table

I am running QGIS 2.4 on a mac, and all of the text in my attribute tables appears in Chinese. I've tried uninstalling and re-installing, changing the locale to U.S. English, and nothing helps. I've ...
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0answers
14 views

QGIS 2.4 match borders of two shapefiles

I have two shapefiles of the same place, but one of them is wrong and I need to match the borders with the other shapefile. I´m using QGIS 2.4 and couldn´t do it so far. Thanks.-
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13 views

QGIS 2.2.0-Valmiera 64bit on windows 8.1 displays error while creating ROI in SAC plugin

I don't know what happened while creating ROI during Classification using Semi automatic Classification Plugin 3.1.0 "Rome" installed on hp Pavillion i7 with windows 8.1 When i started to generate ROI ...
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1answer
14 views

How to style a Vector layer in QGIS using a numeral of an attribute

I have a simple vector layer in QGIS that I would like to style with numerals based on the ID attribute. For instance, point with ID 1 will show up as the numeral 1. Is this possible with default ...
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12 views

Qgis - How to connect to an Oracle DB (SDE)

I want to access an Oracle Database (with SDE) from Qgis 2.4. I have tried many different options from within the window Create a new Oracle Connection but I always get an error message (ORA-12514: ...
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1answer
17 views

QGIS + gdb-Dataset (ArcGIS)

Looking for help for my problem with Qgis. I'm using qgis 2.2 and 2.4 for potential analysis of surfaces. Data are based gdb datasets that were created in Arcgis and made ​​available to me. Some gdb ...
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4answers
148 views

GIS analysis to find duplicate geometries

I have a big shapefile that contains all the buildings and houses of the town that I work in (approx. 90,000 features). The data of the buildings/houses are saved by the town's surveying engineers and ...
2
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0answers
22 views

How to snap and move circles by the center?

I have a point layer, and a polygon layer with buffers of a given radius around each point. I need to move points, and check that each buffer is not above forbidden land/plots. In autocad, you can ...
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1answer
16 views

Importing a temperature raster layer to QGIS project

I am trying to add raster layers to depict minimum monthly winter temperatures for two counties in Ireland. I tried importing as tiff., ADF., HDR., and bil. files. I managed to add them in any of ...
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15 views

GPS with QGIS--what happened to the capture point?

I have been using QGIS for years but when v. 2 came out and important functionality seems to no longer work. In 1.8 the "capture point" or "capture line" buttons on the GPS panel would work. Ever ...
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0answers
7 views

How to make my PostGIS vector layer in QGIS visible?

I have loaded a shp file (simple polygon with one entry) into PostgreSQL 9.3 (with extention PostGIS v2.1.3). I now want to load this layer into QGIS (v2.2.0 Valmeira) via the "load Postgis layer) ...
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24 views

QGIS WFS Error - Could not commit changes to layer

I have a PostGIS database being served by Geoserver. I can load the layers I want into QGIS no worries; however whenever I try to edit the layer I get this error message: Could not commit changes to ...
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1answer
27 views

How to open the “File Browse” dialog in Windows from a PyQGIS plugin code?

I am in the process of developing a plugin for QGIS using Python. Note that this is my first plugin, so the query could be quite basic... I have used this Digital Geography link to create the basic ...
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23 views

Identify features button disabled

I am new to QGIS. I have installed 2.4.0 and opened up a .qgs file without problems. But the "identify features" icon is disabled/blacked out and not functioning. Please find screenshot below. Why do ...
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2answers
20 views

How to get shapefiles or kml files for city map in India?

I am doing a project. In that I'm using QGIS for visualization purpose. Using the OpenLayers plug-in i am getting map of a city. What i want to know is whether I can convert that into shapefiles ...
2
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1answer
50 views

How to cut and paste polygons in QGIS so they don't overlap?

I use QGIS, and I need to cut and paste polygons so they don't overlap. Here's what I mean: I have shapefiles for cities that I'm pasting into a new polygon shapefile. I also have shapefiles for ...
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1answer
42 views

Update QGIS on Mac OS X

I would like to update QGIS from 2.2 to 2.4 on Mac OS X (10.8) but I cannot find how to do so. Do I have to uninstall and re-install all from KyngChaos? If so, I would therefore lose the extensions ...
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0answers
28 views

midpoint of segments in QGIS determination

Gene thanks for your note on the problem yesterday ... This is a follow up to a question I posed before (How to find the middle point of a line in QGIS - Where to place input file name). Errors coming ...
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0answers
20 views

Correct syntax for retrieving features from GML format in OpenLayers

Yesterday I made with qgis the shapefiles of my town and now I wanted to add them in a web application I'm making with OpenLayers. The problem is that, while it loads them perfectly with the wms ...
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1answer
117 views

Can PostGIS and QGIS provide dependable multi-user editing?

After considering a few options, I'm trying to give my 15-20 QGIS 2.2 users the ability to concurrently view/edit one or two basic point PostGIS layers, largest one has just 16,000 records. I've ...
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0answers
27 views

QGIS There isn't entry in geometry_columns!

In PostgreSQL v9.3 with PostGIS v2.1 extensions I created a view from two tables (sites & visits). The site table contained a point geometry column (the_geom), which was included in the created ...
2
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0answers
38 views

QGIS atlas generation to make company expansion slideshow/video

I need to create ~98 maps each showing the locations of customers as a company expands over a time series. These will be made into a slideshow/video showcase so all maps need to have the exact same ...
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0answers
38 views

Is there a python function in QGIS to detect if the output file is saved to the hard disk?

I'm currently using QGIS 2.4 and writing some custom scripts on it. A proper script not only accomplishes its function, but also accepts user defined parameters and checks for possibilities of errors. ...
2
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1answer
32 views

QGIS crashing when using 'save as' to save a new projection

Every time I try to save a layer with a new projection using 'save as' my QGIS crashes. The new files are there but they seem false. Please see two screenshots attached, one before and one after I ...
2
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1answer
28 views

QGIS atlas-generation: Is it possible to preserve the map section?

My aim is to generate several maps with the atlas function in QGIS 2.4 (win7 64) showing the same map section and scale. However, each generated atlas map shows a slightly different map section (not ...
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2answers
44 views

Standard deviation classification in QGIS

Is it possible to implement Standard deviation classification in QGIS symbology of a layer like in ArcGIS: http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?TopicName=Standard_deviation I need to ...
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23 views

Joined field not recognized as number in QGIS 2.4 [duplicate]

I have a weird problem. I've loaded in QGIS a point shapefile and a CSV table. Then I performed a join between the 2 layers and all works fine. But then the joined columns (made of integers or real ...
3
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1answer
49 views

OpenLayer plugin in QGIS 2.4 not working

OpenLayer plugin in QGIS 2.4 is not working properly when not loaded in first place. If I add an OSM map with the plugin immediately when opening QGIS, all goes well. But when I call the plugin ...
2
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0answers
24 views

How to find the middle point of a line in QGIS - Where to place input file name

I am trying to follow the python code below (How to find the middle point of a line in QGIS) to create midpoints of line segments in QGIS 1.8. I am receiving errors executing the code. Unfortunately, ...
2
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1answer
43 views

Adding new Field and writing values for all features

I need to create new Field in Attribute table of vector layer, and afterwards to calculate values and store them in that Field for all features I have in that layer. I have solution which works, but ...
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0answers
28 views

Batch export to shapefile by attribute field in QGIS

I have a project in QGIS where I am creating a map of plants over a large area. I want to take the "Genus" field (of which there are 100 hundred values) and essentially create 100 shapefiles based on ...
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0answers
31 views

QGIS OD matrix assignment on network

Using QGIS, I would realize an assignment of an OD matrix on a network, like this one on Transcad. I have: - network - points of Origin and Destiny - flows of traffic for each OD I found a solution ...
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0answers
26 views

QGIS Add WMS layer with python

I'm developing a stand alone python script using QGIS 2.2.0 libraries. I want to add a WMS base layer to my map, and I follow the instructions reported by the documentation: urlWithParams = ...
5
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1answer
44 views

Is it possible to have a 1:n join which takes the min, max, or average value?

I need to join the attributes of a shapefile with the one contained in a .dbf (or .txt) file. I currently use the "join" in the properties menu, but I have a problem. In the shapefile I have one ...
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0answers
16 views

QGIS server pie chart false rendering

I am currently working with QGIS 2.4 on Windows 8.1 pro and with QGIS-server on Debian 7. I want to publish a map with diagram but the render is not good. At right is the desktop map and at left the ...
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0answers
13 views

Using setCrsTransformEnabled in qgis 2.4

In the python console of qgis I try to load layers from shapefiles which have different CRS using the setCrsTransformEnabled() method. To test the procedure I changed the CRS of the shape file using ...
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37 views

How to periodically refresh QGIS display with updated shapefiles?

I'm creating updated shapefiles for a fixed set of layers in a project every 15 mins. If the user has that project open in QGIS on a Windows 7 PC, I can't overwrite those shapefiles, so I rename the ...
0
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1answer
21 views

Ubuntu QGIS 2.4.0 SSL connection to remote PostGIS fails b/c can't specify certificates

I can connect with SSL in PGAdmin to my remote server, but it requires specifying the filepaths for certificate files due to my having different certs for different servers. However, when connecting ...
5
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1answer
291 views

Using ArcGIS and QGIS together in multi-user editing environment?

We have a GIS staff of 7, and another group of about 14 who "use GIS" from time to time. We really, really want multi-user editing. Mostly of a large point file, and we're almost never in the same ...
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1answer
33 views

dealing with geometry that should be geography (bad coordinates)

I'm working on a project with a few publicly available datasets. One of them is from the USGS, it's their prediction of peak ground acceleration in 50 years. Here's a link, and here's what it looks ...
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2answers
44 views

Unable to merge CSV and CSVT with shapefile using QGIS due to “text” fields?

I know the question is all over this site, unfortunately I cannot find a solution. I have this CSV file and this CSVT file that I want to merge with this shapefile. I've tried to format the .csv using ...
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0answers
20 views

QGIS, drawing entity with a magnetized knot

I wanted to know if it was possible to draw with a magnetized knot, like Archi or Autocad ... !?
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0answers
16 views

Automating Print Compositions in QGIS

I'm having trouble creating a print composer using the QGIS API. I have to export several .pdf's which each display different map layers, hence the automation in the python console. The code below ...
3
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0answers
36 views

How to create a python plugin in QGIS 2.4.0?

While I am learning to create a python plugin in QGIS 2.4.0, I have followed the proceedure expalined in ...