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

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89 views

Unable to Add Features to PostGIS Layer in Quantum GIS 2

I am testing out Quantum GIS 1.9-master and I've noticed that I am only able to add features to a PostGIS 2.0 layer if that layer is in a schema with the same name as my login. For example, if my ...
2
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1answer
89 views

using “abs()” function in QGIS field calculator?

I'm pretty new to GIS in general and I'm trying to take an absolute value of the difference between two fields in field calculator when creating a new field, but using ABS () returns an invalid ...
1
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0answers
215 views

problem overlaying osm with os-derived data in QGIS - both British National Grid

I am currently working alongside city council datasets derived from Ordnance Survey; this is projected in their ArcSDE system as "British National Grid" or EPSG:27700. My problem is that I am trying ...
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3answers
1k views

How to setup a debugger for QGIS Plugin development?

As the title of the question implies, I wish to know how to set up a QGIS Python Plugin Debugger so that I can develop plugins more efficiently. Any information regarding this would be much ...
8
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3answers
1k views

Changing Data Source of Layer in QGIS

Is there a way to source a shapefile to a layer file in QGIS much like how you do this in the properties of an ArcGIS layer? (i.e. Go to layer properties, source tab and then just depress the 'Set Dat ...
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1answer
978 views

Import SketchUp created KML contour lines model to QGIS

There's a neat trick to create contour lines based on the GE 3D terrain using Sketch-Up. The resulting KML however is a model I have looked at ways of importing KML layers to QGIS, like it was ...
1
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1answer
85 views

Error output with gdalwarp

Following is my raster file and mask shape file files I use qgis 1.8.0 to clip the raster with shape file by gdal tools but after I run warp in gdal tools it's just give me no data in the output ...
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0answers
31 views

Qgis dynamic web maps [duplicate]

I am new (Mac lion 1.8.3) Qgis 1.8 user . It was very easy till now to make a map. But now I am facing the next step that is out of my knowledge. I want to publish dynamically the map to my web page. ...
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1answer
228 views

QGIS plugin WORKS under Windows but NOT under Linux. How to get fîle path properly under Linux?

I am currently working on a QGIS plugin which depits node to node discreet flows. Let' say adaption of Tobler's Flow Mapper to QGIS. Plugin currently tested and working under Windows. But not under ...
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0answers
68 views

How to simplify vector lines into an overlaid grid in QGIS?

I'm a relatively new user with GIS software (primarily QGIS) and I'm sure this is probably quite simple but I've been trying to find an answer for ages! I have transportation network data for an area ...
3
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4answers
1k views

Can I use QGIS with Qt5?

I want to use QGIS with Qt 5.But i don't know the exact relationship between Qt and QGIS.Will there some problems if i use qgis with qt5 or it will not depand on it...
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1answer
71 views

Qgis 1.9 issues with python [closed]

I already installed the version 1.9 of Qgis and when i runned e Script python on i could this error 'NoneType' object has no attribute 'children' however it works fine on qgis 1.8 could someone ...
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2answers
1k views

Is QGIS suitable to create maps with image popups?

I am a new user of QGIS and was wondering if I came across the right software to achieve my goal. Long story short, I am trying to create a map with markups of various buildings. Once I click on a ...
2
votes
1answer
300 views

How to configure Geoserver WMS to make it printable from QGIS/ArcGIS?

I have installed geoserver 2.3.1 - I am using this to create a WMS of some data held in PostGIS. I can view the WMS in QGIS and ArcGIS, but it won't print from ArcGIS (blank sheet) and in QGIS I get ...
0
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1answer
129 views

Run fichier.sql in QGIS python console

i use QGIS and i want to know how to run a sql code (fichier.sql) in python console in QGIS I have used this : impost os os.system("psql \i C:/fichier.sql -d test2 ") but it doesn't work Any ...
8
votes
2answers
3k views

How best to share QGIS data with an ArcGIS user?

I mainly use QGIS and have a large project to complete. Once I am done I'll need submit my data to an ArcGIS user. The data will consist of mostly point and polygon shape files. Is there a best ...
1
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1answer
2k views

Overlaying lat/long graticules on projected map using QGIS?

I am using an equal areas projection of North America and would like to overlay a lat/long grid. I can do this in the print composer, but only for the coordinates. Can QGIS do a distorted grid for ...
3
votes
1answer
919 views

Unable to install QGIS 1.8 on Ubuntu [duplicate]

Can someone please walk me through installing qgis on Ubuntu 13.04. I keep getting 1.7 no matter what I do and I would like 1.8 if possible. I am a new Linux user. This was addressed in a previous ...
2
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1answer
485 views

unable to install qgis 1.9 on Lubuntu 13.04 [closed]

I tried to install qgis 1.9 in my laptop. I use Lubuntu 13.04 (64bit). I used the repository deb http://qgis.org/debian-nightly raring main deb-src http://qgis.org/debian-nightly raring main ...
1
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1answer
294 views

Why does the Clipper tool lack the mask layer option?

Fairly new at QGIS, but everything's gone well so far. I'm running QGIS version 1.8 on a Mac (OSX 10.8) and GDAL 1.10, and other GDAL tools (like Merge and Georeferencer) work just fine. When I ...
2
votes
2answers
120 views

How to overcome the layer limit on OSX?

I am trying to add many layers to a project in QGIS. After adding approximately 80 layers, QGIS returns this error: "not a valid or recognized data source". There is nothing wrong with the shapefiles ...
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0answers
73 views

How to transfer absolute node position to latitude and longitude? [duplicate]

I am new to gis and also a newbie using QGIS. I have got a Layer with one shape. I extracted the nodes from the shape. Now I have got the absolute X and Y value of my Layer in the attribute table. ...
1
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1answer
76 views

For each polygon, return yes/no value if it intersects another layer

I have a polygon grid overlaying several other polygon vectors. I wish to visit each polygon in the grid and ask yes/no if each of these layers fall within the grid cell or not. I can do this easily ...
2
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1answer
187 views

How to get a correct scalebar in QGIS?

I apparently have a problem with getting meaningful scalebar values referred to a shapefile in QGIS. I think I tried all solutions suggested in other discussions, but still I don't get it. I use QGIS ...
6
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1answer
151 views

Database Diagrammer for PostGIS [duplicate]

Is there a application, or QGIS plugin to generate database diagrams (specifically for PostGIS) similar to the ESRI Diagrammer? Thanks...
3
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1answer
520 views

Why is Spatialite showing dates in MM-DD-YYYY format?

I have a table with a dates column that is formatted in MM-DD-YYYY format, as shown in SQL SELECT statements. I'm using Qspatilite (QGIS 1.8) and Spatialite GUI. When I ORDER BY the date column it ...
1
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1answer
2k views

How to use GDAL-commands in QGIS?

I recently used a GDAL-command working with the OSGeo4W command line, but it does not feel that comfortable. Is there a way to somehow execute a GDAL-command directly in QGIS? Right now the ...
1
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1answer
39 views

How to cycle thru items in print composer?

In print composer I have many items placed on the "paper". These items include borders, one map, bar scale, logo and an arrow. When the items overlap each other I am only able to select the item on ...
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1answer
111 views

Help with trying to track ice and polar bears on a map. No idea where to begin

I was asked create a little google map showing the location of Polar bears. I've been given the location data in lat-long format. For each bear I've been given a file containing the following ...
2
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0answers
174 views

QGIS - Android, loading a .tif file

I have a .tif file I would like to use as my base map on the Android version of QGIS. However, when I try and load it as a raster layer, it states that this is not a correct raster source. Is there a ...
0
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1answer
115 views

Strange problems with project crashes and bad:alloc in QGIS 1.8 linux

during last days I had to prepare some maps from field data. I mainly worked with point shapefiles and openlayers map background. After some time I always noticed some problem like just partial ...
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0answers
232 views

Oracle Spatial support QGIS 1.9-0-Master (Ubuntu)

I just installed QGIS 1.9.0-Master (Build 480) on a Ubuntu virtual machine. I am running/compiled against GDAL/OGR 1.9.2. My question is why I cannot add Oracle Spatial Layers as I am able to do ...
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2answers
156 views

How to clear attribute columns from a Shapefile?

I want to clear all columns from a SHP. Only need geometry of features. I use QGIS and Sextante with grass and saga. Is there any tool for this job...
1
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1answer
550 views

Which CRS fits “Lambert Conformal Conic Projection, Standard Parallels 46.40 and 49.20”?

I am trying to georeference a VFR chart in qgis and I can't figure out which CRS to use. Map projection - Lambert Conformal Conic Projection, Standard Parallels 46.40 and 49.20. Any ideas which ...
3
votes
3answers
1k views

How to add QGIS Python API Intellisense support in Aptana Studio3/Pydev

I'm developing QGIS plugins using PyDev in Aptana Studio 3 and I would like to know if it's possible to make it aware of the QGIS API and add some "intellisense" functionnalities when programming. For ...
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2answers
583 views

Georeference IMG file in QGIS

I have a problem: I'm trying to georeference a satellite image (ASTER, ERDAS Imagine file *.img) in QGIS. I have georeferenced with QGIS before and never had any problems. The file is georeferenced ...
0
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1answer
122 views

No legend in QGis Web Client

I have a QGIS Web Client working, but it lacks a legend and metadata panel as is shown here What do I need to have the referred legend panel?
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0answers
45 views

can the Identify Features button in QGIS list data in natural order

Is there anyway to get the Identify Features button in QGIS to list my attribute data in their natural order, NOT in alphabetical order?
2
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1answer
368 views

Solution for slow display of postgis-tables ? (qgis 1.8 + postgis 2.x)

I have the problem that my postgres-tables are displayed very slow when I scroll them in QGIS. I have no problem with other tested GIS (e.g. UDig, GVSig, ArcGIS). The number of objects isn't large ...
1
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0answers
225 views

SEXTANTE runalg and QgsVectorLayer issue

I'm trying to make a script for converting polygons to lines. But I'm having some issues while generating temporary layers. In this script, I iterate through all the features of the input layer to ...
4
votes
3answers
1k views

How to find the polygon inside which a point lies?

I have a layer with polygonal features. Each feature has attributes and values. I also have a list of co-ordinates and I would like to know which feature (or polygon) the co-ordinates lie in. Could ...
0
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1answer
63 views

How to Create a Note System inside QGIS

I need to make something similar to a note system, where i can create a feature that will give me something similar to a note system (or a square in the map linked to a feature that will only show ...
1
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1answer
359 views

QGIS Crashes when I try and overwrite a shapefile using QgsVectorFileWriter.writeAsVectorFormat (QGIS 1.8, MacOS 10.7.5) [closed]

I'm somewhat new to this, and working on a plugin. My plugin will create a points memory layer, which is then written out as a shape file using QgsVectorFileWriter.writeAsVectorFormat. self.writer = ...
4
votes
2answers
541 views

How to convert numeric fields into strings with leading zeros?

I'm trying to define an action in Quantum GIS using on of my fields but I have some problems with its format. I have a numeric string like '5' and I need to have a format like '005'. I've tried ...
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1answer
174 views

Why new feature disappears when editing polygon?

I try to create internal polygon within existing polygon. After I created a ring, I add a new feature inside the ring. Suddenly, this new feature disappears. I confirmed that this feature went to the ...
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1answer
84 views

How do I put label inside polygon at any scale in QGIS 1.8.0

I would like to put labels inside polygon anytime and any scale. I'm using "Labeling" from the toolbar. Although I tried all types of the placement from the advanced tab, some labels still fall ...
1
vote
2answers
397 views

How to write a QGIS regex for rounding to two places after the decimal point?

In QGIS field-calculator round() is not working in QGIS 1.8 so I try to do the following with a regex: I'd like to keep the first two places after the decimal point - where do I go wrong? ...
2
votes
2answers
142 views

Sextante modeler feature selection

I am trying to select grids (polygon geometry) that intersect with a building layer. I can do it by using "Select by location" tool and then I generate centroids from the selected grids. There is no ...
3
votes
2answers
522 views

How to add layer/raster with specific position in the QGIS layer list?

I use addRasterLayer(rast,'Name') but this adds the raster to the top. It is possible to set position when I add raster at once? Is it possible??
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2answers
80 views

Error reported when trying to import prj for data points in New Brunswick Canada into QGIS

I have data points recorded with a Trimble GIS. The projection is New Brunswick Sterographic Double Projection, which as near as I can find via a Google search is EPSG:2953. However, when I try to ...