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

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Maintaining times with points2one in QGIS?

I have a problem that might be trivial, but I really cannot find a solution! I have a csv files with several points (x,y). These points represent the position of different animals at different ...
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2answers
132 views

QGIS – Raster Calculator: Using flat (no data) areas of an aspect-raster in the raster calculator

I´m playing around with the Raster tools, following more or less the qgis-tutorial but using my own data. When I calculate the aspect of a DEM, flat areas are (logically) left without data. However, ...
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0answers
19 views

Problem with Gpstools Plugin

I installed QGis 2.4 either with the standalone and Osgeo installers on a win7 Pro 64 laptop with 4 gb of RAM and I have the following problem When I invoke GpsTool either by the icon or the vector ...
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1answer
329 views

PyQGIS: Print Composer Map with Table

I am looking for a way to print a custom feature form created in PyQt Designer for QGIS 2.4 using PyQGIS. My goal is to print/save image as the current extent of the map with the selected feature's ...
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36 views

QGIS + python, Attribute index 0 out of bounds [0;0] when adding a feature to a PostGIS layer (view)

I have a plugin which adds features to a particular PostGIS vector layer using the code below feat = QgsFeature() feat.setGeometry(qgsgeometry) layer.dataProvider().addFeatures([feat]) For one user ...
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2answers
146 views

How to update postgis layer from shapefile in QGIS?

My usual workflow with updating layer from shapefile was to: Open DB Manager; Load SHP files into QGIS; Open DB Manager; Import file (with drop option). Now my problem is that I have created ...
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1answer
84 views

QGIS to solve projection mystery in Postgresql

I downloaded some data from local agency. Per QGIS 2.2, I defined the projection to 'EPSG:3587 - NAD83(NSRS2007) / Michigan Central' in postgresql (maybe ArcMap). Data is in Postgresql 9.3. I am ...
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66 views

QGIS Reshape Tool

I just downloaded Quantum GIS and have been playing around with the editing features. For some reason, the Reshape Tool is not working for me. The manual said that at the end, you right-click and it ...
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0answers
8 views

How to debug a QGis C++ plugin with Visual Studio 2008 [duplicate]

I have a plugin for QGIS 2.2 in C++ (legacy). I dont find how debugging this plugin, with Visual Studio 2008 (for evolution, etc.) Sorry for my bad english. Thanks you ! Paho
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54 views

QGIS Init script: How to get active layer and GID of edited object?

I would like to ask, how to get the GID (from Postgresql+Postgis) and active layer of edited object in QGIS Init script (Python)? Code Layer=qgis.utils.iface.activeLayer() works in QGIS console, but ...
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103 views

Standalone QGIS application - handling QgsVectorLayer load errors

I am creating an application with QGIS libraries, and in the event that the app can't add a specified layer (e.g. no connection to host, no password specified etc), it causes the app to crash, ...
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20 views

Low quality legend in QGIS [duplicate]

I am sorry to repeat a question already asked by someone else, but it has not been answered yet. When I create a map in QGIS the legend symbols for some reasons have a very bad resolution and are not ...
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0answers
23 views

QGIS --> ArcGIS server by WMS? [duplicate]

I have found this post: Quantum GIS ->ArcGIS Server configuration possible? My question is more specific >> Can I publish feature layers to ArcGIS server from QGIS using WMS?
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0answers
56 views

tilestache wms layer in qgis and open layer rendered layer

I have setup tilestache and styled a map for using mapnik xml and I can call on the url in a web browser, how can I call the url for a wms layer in QGIS or is there a way to view mapnik xml in qgis. I ...
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177 views

Error when providing “Python init function” from Python script in QGis

Problem I am using QGis and Python scripting to programmatically set a layer's edit form and "Python init function". It appears that the Python init function is called correctly in one situation ...
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1answer
171 views

What is the typical v.surf.xxx exicution time?

What is the typical v.surf.xxx exicution time? I am trying to run v.surf.bspline on a set of ~1600 points. It has bee running for about an hour now and is stuck at spot indicated in the image. I ...
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1answer
21 views

Can I upload an LPA file (Long Profile) to QGIS

I have a .lpa file that I'd like to upload to QGIS - Can this be done and if so, how? Thanks!
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1answer
57 views

Width and distance when using line patterns in QGIS

I am trying to make a cross hatch polygon fill (example link attached) using the values (defined by law) of 0.1mm for line width and 0.8mm for distance between the lines. But I don't get/see any hatch ...
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0answers
52 views

maptool doesn't receive key pressed events after QMenu.popup() function

I am developing a qgis python plugin which uses a maptool receiving key pressed events by keyPressEvent(self, event) function, mouse movements events by canvasMoveEvent(self, event) function and mouse ...
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1answer
166 views

sub-dividing KML files

I do have a kmz file which marks the boundaries of a larger district and it's sub-districts. Still new to GIS and in the process of getting familiar with QGIS, I wonder can anyone advise me how can I ...
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159 views

DXF (points and lines) in QGIS - Doesnt import z coordinates

Trying to get to grips with QGIS, coming from a Mapinfo and Civil3D background. I have a DXF file with points (X,Y,Z) and lines. I want to open this in QGIS and use the interpolate plugin to create ...
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80 views

Can I create a cross section from points along a line without using a DEM in QGIS?

I have a set of points perpendicular to a river and would like to present a cross section of them. Like a simple graph in Excell for example, with Z as y axis and distance along the line as the x ...
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0answers
35 views

Is the QGIS API suitable for my application

I am working on an Linux/QT application that includes a real-time map based display of multiple robotic vehicle positions, where the positions are derived from a variety of sources--some are GPS, ...
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0answers
60 views

gdal_translate from within pyqgis [duplicate]

I want to use gdal_translate from within a python script in my plugin qgis2leaf. I've tried with ...
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1answer
69 views

Qgis - unwanted offset when using raster interpolation plugin

I'm using QGis and I have a set of points with a depth attribute. I'm trying to make an interpolation using the Raster interpolation plugin (Raster -> interpolation -> interpolation). But when I do so ...
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33 views

Changing original source projection

I am attempting to match up 2 raster layers, both a OS survey map and some independent survey data. The map I know to be in the correct position, However the survey data shows a layer extent of (layer ...
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1answer
54 views

how to select line segments not overlapped by other layer's lines

I have two shapefiles of forest roads (mostly dirt) from different sources, covering the same area. The goal is to build one shapefile of roads that is the composite of the other two. Layer A is ...
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31 views

how to join 1second GPS data with dGPS using much shorter time interval?

for one of our measurements we rented a dGPS with a portable "rover". I have now our measurements from our device which also contain data from built-in GPS (1 second sampling rate) + also the dGPS ...
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122 views

How to extend lines from “station line” plugin in QGIS

I'm trying to create cross sections using the station line plugin (and then import them to HEC RAS). But I can't seem to create lines longer than 99.99 meters from each side of my river line. Is this ...
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1answer
54 views

QGIS copy and paste error: “no features could be successfully pasted”

What does this error message mean, and how can you get more info on what might be the cause? "no features could be successfully pasted" (or more generally, not all of the selected items could be ...
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46 views

qgis pdf doesn't show google street

Apologies I've created a map? using location data imported from a csv file and labelled nicely and I've added (a very inaccurate) Google Street map. When I use Print Composer to create an annotated ...
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1answer
97 views

from Qgis 2.2 to Garmin Base Camp: how to get rid of the white frame?

I have geo-referenced a raster map in QGIS 2.2 (with the georeferencer plugin) and I can also create a kmz file for my garmin (Dakota20) with GarminustomMap. However the kmz file, as imported in Base ...
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157 views

Why can I not publish from -QGIS Geoserver plugin?

I am following the tutorial at http://qgis.boundlessgeo.com/static/docs/quickstart.html and I get to the step "To publish the project as it is, just select the QGIS project entry in the OpenGeo ...
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0answers
18 views

QGIS Google satellite layer moving each time it's turned on [duplicate]

I have imported location data in a text layer, CRS = WGS84 and have put in Google Satellite and Google Street (WGS84/pseudo mercator) in but each time I switch on a Google layer it moves relative to ...
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17 views

QGIS - is it possible to write a plugin for xulrunner

i want to write a plugin for a xulrunner application, to show a map generated by QGIS. Maybe it's better to describe this a little better ;) Can I write a cpp programm, which allows me to show a ...
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25 views

Arcv2CAD for QGIS plugin?

I'm wondering if there's a QGIS plugin to do what Arcv2CAD does: export a shape file to DXF with options to include attributes as CAD object attributes or a layer of labels. My current experience ...
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0answers
13 views

Create shapes using google streets layer of openlayers plugin [duplicate]

I am using openlayers plugin to use as the base layer of streets google. I have attached the picture that you can see that the more I give to zoom overlay layer moves. When I used another shape as I ...
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0answers
52 views

Qgis Server, show Oracle Georaster dynamically

I have an Oracle Spatial database and I use rasters (SDO_GEORASTER). I can render some rasters on a web page with Qgis Server : when I render the maps on the webpage, it come from a qgis project ...
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1answer
307 views

PyQt resources file to display images on QGIS custom feature form

I am having issues creating a PyQt4 resources file to display images in my QGIS 2 custom feature form using Windows XP. These are the steps I followed: -Added QLabel and clicked "choose resource…" ...
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1answer
129 views

PyQt QTableWidget for QGIS python plugin: infinite loop issue

I'm using PyQt4 and Python 2.7 to develop a plugin for QGIS 2. I have QTableWidgets used to display/compare existing information in the database with newly entered information pertaining to the same ...
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2answers
57 views

How to set a coordinate transformation GRID

Does anyone know how to set a coordinate transformation in qgis so I can measure the distances in meters or kilometers? If anyone has a clue, would be just great. Thanks!
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0answers
107 views

How to create .dem file in QGIS?

I have an elevation data in .asc file, but need to convert it to .dem file to later use in COMSOL. However, in Raster--> Analyzes-->DEM I got just error message: ERROR 1: DEM Default Setup: Importing ...
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0answers
50 views

Scale keeps changing in QGIS composer?

Every time I pan the map content in the QGIS composer window the scale changes. Is there a way to make it stick at specific scale?
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0answers
20 views

How to build an optimization model? [duplicate]

I want to make a model using QGIS. Is it possible? Then how can I develop a model. can anyone help me?
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0answers
28 views

qgis: module crashed or killed

using Grass 6.4.3. via Qgis 2.2.0 Valmiera (standard installation package): Why would Grass modules suddenly produce a "module cashed or killed" error. specifically in relation to r.surf.idw2 and ...
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0answers
37 views

QGIS - Obtain elevation profile [duplicate]

I wish to obtain a bathymetry profile along the selected path (Google Earth calls this feature "elevation profile". Can QGIS 2.2 provide this? I created a layer using the WMS service to load the ...
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1answer
98 views

Modifying Fields in QGIS

I'm pretty new to Quantum GIS, and I was looking to add zeros to a field I was having some trouble with. I learned through browsing a few posts here that existing fields can be modified by defining ...
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0answers
47 views

Enlarge region/features in shape file

I'm completely new to QGIS. I have a shape file over the counties in Denmark (see here for what the shape file looks like). The counties around Copenhagen are rather small and I'd like to add an ...
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0answers
80 views

Save map canvas as image with drawings

Is there any way to save the map canvas as an image, with the drawings on map? I draw a line on map, and saved it as image, but only the map saved(without line). I used the following code.. ...
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18 views

Created polygon appears to move when zooming in (qgis)? [duplicate]

I am using QGIS 2.20 on a Windows 8.1 64-bit laptop. I have a shapefile that includes a polygon that I created from digitizing a Google Satellite image from OpenLayers Plugin. Here is my problem: ...