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

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2
votes
0answers
36 views

OpenLayers preview problem?

I just want display shapefile (.shp) that I have made in QGIS in openlayer geoserver. but There is a strange object that appears. I want to ask how to get rid of the strange object.
3
votes
2answers
23 views

QGIS ASCII Grid output problem

I have this .asc file of maximum temperature of a local place. This file is a result of vector to raster (GeoTIFF) conversion then GeoTIFF to ASCII grid conversion, both using QGIS. Here is a snippet ...
0
votes
0answers
35 views

Can QGIS generate a map that composed of several .shp maps?

I'm using QGIS-2.4.0 API to develop application. I need a map that composed of several vector layers. If only this, it can be done by merge in QGIS, but I need more for that: the map(or project?) I ...
1
vote
1answer
15 views

Change QGIS Processing (Sextante) default arguments for r.out.gdal

Lately I've been using r.grow through the QGIS Processing Toolbox on several rasters which represent the whole world with 500m grid spacing. It takes many minutes to save the output. The reason seems ...
2
votes
0answers
17 views

Path on network returning wrong results

I have created a shapefile of polylines that represent a path with multiple intersections. Then I have used the networkx python library to create a network. At the first the results were satisfactory. ...
3
votes
2answers
37 views

Digital Elevation Model and Shapefile not aligned in openWind

I have a digital elevation model and a shapefile containing point features for the location of wind turbines. These two layers appear to be aligned in QGIS but when I open them in openWind, they are ...
2
votes
1answer
42 views

Plotting Postal Codes from .csv Files in QGIS

I have Canadian postal code data that I would like to plot. This data is currently stored in a simple .csv file. At the moment the only other data I have is FSA data from Statistics Canada. Is ...
1
vote
1answer
31 views

create buffer to QGIS [duplicate]

I'm trying to create a buffer I'm using QGIS 2.4.0 layers and have street departments and rivers with coordinate system EPSG: 4326 - WGS 84 I need to create a buffer layer 500 meter rios This ...
1
vote
0answers
21 views

QGIS Server does not publish Oracle Spatial Layer

I want to publish a Oracle Spatial Layer which is defined in a QGIS Project with the QGIS Server as a WMS. The capabilities document of the QGIS Server does not include the layer description of the ...
2
votes
0answers
26 views

Command line tools to generate elevation profile from DEM + GPX/GeoJSON

I'm looking to generate elevation profiles from a number of GPX traces (which I also have GeoJSON conversions of). I have 20m resolution DEMs of the area, in GeoTIFF format. Ultimately I want to ...
3
votes
1answer
87 views

Automated removal of dangles / loose ends in line with QGIS?

Here's what I want to do: The original line is a dissolved osm extract of ways, which I want to simplify to one continous line without dangles / loose ends (red x's in picture). I found the ...
2
votes
1answer
15 views

How to define KML Name element when using QgsVectorFileWriter?

I am trying to use QgsVectorFileWriter to write a kml file from an active layer in QGIS, but cannot figure out how to define the KML Name element (called NameField in the QGIS save-as GUI) to ...
0
votes
2answers
59 views

How to install QGIS with OpenGeo Suite on Ubuntu

I was wondering how should one install QGIS after installing OpenGeo Suite on Ubuntu Linux? I installed OpenGeo 4.1 on Ubuntu 12.04 following the instructions on the official website ...
2
votes
0answers
40 views

Problem with print composer when exporting a map with Google Maps Plugin in the background

Whenever I try to export a map with the Google Maps plugin in the background, it exports but just exports to a blank document. When I turn the Plugin off so it is not in the background, it prints ...
1
vote
1answer
69 views

How to change the postgresql table to support postGIS?

I have a postgresql database which there is the table have lat & long columns. The postgresql does install the postgis extension. My question is how can I change the table with lat & long ...
3
votes
1answer
49 views

How to automate the execution of Python console in QGIS?

I want to automate the execution of Python console in QGIS. When QGIS start, Python console starts at the same time, and Python predetermined code wants to be executed. Currently, in order to ...
2
votes
1answer
34 views

SVG Issues in QGIS API

I'm using QGIS-2.4.0 to developing an application. I created my own custom MapCanvasItem for showing SVG. It is great to load a SVG from symbol library that QGIS provides(such as d:\QGIS ...
0
votes
0answers
25 views

insert copy move files in QGIS

I'm using QGIS 2.4.0 is the first time I use QGIS to open the application "QGIS" explorer I need to paste a layer in another folder try selecting the shaperfile but gives me the option the broswer ...
1
vote
0answers
22 views

wrong layout when using Openlayer plugin

I'm drawing a simple map and I noticed a weird problem. Very briefly: I have a simple shapefile (a region) and the Google Satellite layer of the OpenLayer plugin activated on my map canvas. On the ...
0
votes
0answers
47 views

Importing a Raster into PostGIS 2.1 (Windows 7)

I am trying to learn how to import rasters into PostGIS (2.1). I have read through all the material I can find on doing this and know that the recommended tool for this is the raster2pgsql tool. I ...
2
votes
1answer
68 views

Opening shape file in OpenWind

In QGIS I have used the OpenLayers plugin to locate a wind farm. I have then used the add feature function to place a point at the base of 7 turbines. I have saved the shape file as an ESRI Shapefile. ...
1
vote
0answers
65 views

Unable to add shapefiles via drag and drop - QGIS 2.4 OSx

I have a clean install of OSx Yosemite Beta 5, with homebrew install of QGIS 2.4 and all its basic dependencies. -QGIS version 2.4.0-Chugiak -QGIS code revision exported -Compiled against ...
3
votes
1answer
45 views

QGIS 2.2 Identify tool highlight settings

Does anyone know how to change the highlighting settings of Identify tool in QGIS 2.2? I mean, when i click on a feature with the Identify tool, the feature gets highlighted in red. Can i change it ...
1
vote
1answer
32 views

Why does QGIS 2.4 prematurely terminates on startup at “Starting Python”?

After reinstalling Python (3.4) as well as OSGeo4W and the QGIS Standalone, my QGIS always crashed when "Starting Python" on my Windows 7 64 Bit environment. It simply did not proceed to the QGIS-GUI ...
6
votes
2answers
161 views

Geo-referencing an old map

I'm trying to georeference this part of an old map of Indochina. . The full extent gives more information: . To do so, I used QGIS and tried to infere the datum, I tried "Unknown datum based on ...
3
votes
2answers
82 views

Interpolation on set of points in QGIS

Is it possible to perform Interpolation in QGIS with input as a vector layer which has a set of points collected following a specified path?
2
votes
1answer
44 views

How to highlight a selected feature in qgis plugin using python [duplicate]

I am working on a plugin that would highlight selected features by changing its color. Can anyone help me regarding this? The plugin searches for required features and once found, I want that those ...
2
votes
0answers
28 views

How setup python path in my ide to recognize QGIS API

I'm using Intellij with python plugin. Classpath for python contains $QGIS/apps/qgis/python but my ide not recognize eg. QgsVectorLayer. Any additional entry is required?
3
votes
1answer
46 views

Spatialite WITH clause issue

I've encountered an issue: when I try to execute in Spatialite_GUI query that contains WITH clause I get SQL error: near "with": syntax error. Also WITH unlike SELECT and other keywords is not ...
3
votes
1answer
45 views

How to use ST_HausdorffDistance (PostGIS, QGIS)

I want to snap the GPX-track to the road network as the image below shows. I found out, that "Hausdorff Distance" is exactly what I need and that it is usable with PostGIS. But unfortunately I have no ...
2
votes
2answers
103 views

How to handle “Error: Town not found” when updating an existing field with Field Calculator?

I want to update a field in field calculator. update existing field is checked. Column to be updated : Column2 CASE WHEN "COLUMN1" IS NOT NULL THEN "COLUMN2" = "Town" ELSE ...
1
vote
1answer
66 views

How to transfer layer data from OpenLayers to PostGIS database or QGIS?

Supposing I have a created some layers in OpenLayers containing only Geometry Points, how do I transfer my data to a postGIS database? Is there a way to turn pure javascript/openlayers to a table in ...
3
votes
0answers
66 views

In QGis, why do parts of the OpenLayers layer export in a different scale and position?

I have a problem printing with google satellite maps in QGIS. In the composer it's all right, but in the pdf file some portions of the image are in a different scale and in a different position. An ...
3
votes
1answer
54 views

How to find mean coordinates of a cluster of points from a point layer in QGIS?

I have a set of coordinate points. The points are distributed in such a way that some points are clustered around a specific area. There is an option to find out mean coordinates(s) of the whole point ...
1
vote
1answer
39 views

Using QGIS libraries to write standalone program in C#?

I have investigate some liberaries which can help me to write stand alone applications. Is there any way to use qgis liberaries in an standalone application which is written by C#?
2
votes
2answers
70 views

QGIS, interpolate along an irregular shape or line to create a DEM

Before anyone marks this as a duplicate, hear me out. This question: Interpolation: irregular shape, merging DEM's asks my question but not for QGIS. Furthermore, the answer is vague and not ...
3
votes
1answer
59 views

Generating a GDAL script through the QGIS Georeferencer

For several months, I have been georeferencing files manually using the Georeferencer plugin within QGIS. I am now attempting to automate this process using GDAL. The Georeferencer provides a ...
1
vote
1answer
50 views

Export to Open Layers plugin doesn't work with Raster and WMS

i am trying to export a Qgis_2.4 project to openlayers using the "Export to OpenLayers" plugin. I cannot export raster layer. I am not getting any error message, but the raster layer doesn't appear ...
1
vote
1answer
47 views

How do I preserve measurement between QGIS and Google Earth?

Wondering if anyone has found a way around this: I am having issues when importing shp files into Google Earth. I need reasonably accurate measurement data and my measurements change significantly ...
3
votes
1answer
52 views

QGIS - Calculate distance between a point layer to n nearest polylines

In QGIS I am trying to calculate the distance from a point layer to a polyline layer for the n nearest polylines. I have figured out how to calculate this distance to the centroid of the polylines ...
2
votes
0answers
47 views

Setting up pycharm and pyqgis

I wanted to set up PyCharm the way this blog post explains: Setting up PyCharm for PyQGIS and Qt. I did everything as instructed but when it comes to adding project interpreters I got this error ...
1
vote
1answer
36 views

Adding attribute columns together QGIS 2.4

I am in QGIS trying to combine a Zip code and City (separate columns) together and my methods are not working. Here is a screenshot of the issue.
1
vote
0answers
21 views

PyQGIS add WMS layer with CQL_FILTER

Dear PyQgis developers! I'd like to add a wms layer through my QGIS plugin with custom CQL_FILTER parameters. My problem is, that the CQL_FILTER parameters are not passed to the GeoServer (I can see ...
1
vote
0answers
22 views

How to get attributes from line-polygon where points are snapped on, into the point-layer?

I have a SQL Server spatial table with point-objects, the points are set by snapping onto a line SQL Server spatial table. so the points are georeferenced on the line. How can I get the attributes ...
6
votes
1answer
73 views

one label for two-lane roads (osm, qgis, postgis)

I labeled my osm-lines-layer (PostGIS) with symbols for primary roads and motorways. While the symbols for the primary roads are well placed - with enough distance between each - the two-lane motorway ...
1
vote
0answers
31 views

Discrepancy between DXF and Shapefile Polygons

I have created a shapefile based on a dxf. the areas are as follows: DXF: 51216417 square metres = 5121.64 Hectares = 51.21 square Kilometres. GIS: 50.998 square kilometres. What could have caused ...
2
votes
1answer
74 views

Line Chart QGIS

I need a plugin or related which displays a line chart easily. I googled it, but nothing seems what I need. I have a K's Ripley table generated with R, which has one column with distance and other ...
2
votes
2answers
88 views

Is there function to know raster's size (KB) with python?

I am doing a script with python. There I have many raster in canvas (qgis) which I would like to know size in MB. I am searching function in python that give me this result. Anyone can help me? Thank ...
1
vote
0answers
23 views

How to handle QGIS Server: Failed to download capabilities?

i am trying to connect to Qgis Server (windows 7) in Qgis Browser but i get this error I have just installed Apache and the module "mod_fcgid.so"
1
vote
1answer
50 views

Using the Live tracking with internal GPS?

We have some Panasonic ToughPads (FZ-G1) with a GPS a module built in. I know where it is and can locate in it in COM 3 and it connects, registers a signal, shows satellite locations, but refuses to ...