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

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2
votes
1answer
701 views

How to call processing toolbox in Qgis' python console

I have been trying to use processing toolbox via python console in Qgis 2.0.1. I am able to write the following comamnds: I am particularly interested to run 'r.statistics' from GRASS module. ...
1
vote
1answer
82 views

What is the use of Automatic overview support in Qgis 2.0?

Automatic overview support in map frame is one one of the new feature added in QGIS 2.0. In QGIS 2.0 Documentation explanation about this is given as Automatic overview support in map frame: "Need ...
2
votes
1answer
526 views

How to resolve “premature end of script headers” error with QGIS Server? [duplicate]

I attempted installing QGIS Server following these instructions. Installation was successful with no errors reported. However, when I try to use GetCapabilities I am getting this error: Internal ...
0
votes
1answer
172 views

Pull pixmap image source from ui edit text in QT

I'm putting together a custom form for QGIS identify using Qt Designer. One attribute has a file name to the accompanying photo of the feature. I'd like to have the photo label in the form grab the ...
1
vote
0answers
59 views

When digitizing, polygons are inverted

I need to use QGIS to digitize my images. My images are scanning electron microscope (SEM) images of rocks. I am interested in analyzing the pore space in the images. Here is the steps I follow: I ...
3
votes
1answer
176 views

How to set and configure a value relation edittype in QGIS 2.0?

I am trying to set the edit type of a vector layer to use a value relation. The Python commands below are processed without errors or warnings, but the when I check the properties in QGIS, only the ...
4
votes
1answer
787 views

How do I add Garmin .img files to QGIS?

I downloaded 10 .img files from garmin.openstreetmap.nl which are supposed to contain the topo tiles for the area I would like to add in qgis. I've been unable to find any instructions on how to use ...
0
votes
0answers
23 views

Qgis doufur, query problem [duplicate]

i've a question about a query I need to query results that are multiple of 50 like 100,150,200,300 How can i perform the right query?
3
votes
1answer
264 views

NOAA Nautical Charts .bsb format

Is it possible to load a nautical chart from NOAA into QGIS that has the .bsb format? Didn't have much luck with mrSID format. using QGIS(dev) on ubuntu 13.04
2
votes
2answers
358 views

How to create callout/balloon labels in QGIS 2.0?

I'd like to use callout/balloon labels for a vector layer in my GIS using QGIS 2.0. The only way I can see to do this is to position an ordinary label where I want it and then draw an empty text ...
1
vote
2answers
106 views

How to view dbase tables?

Using Linux, is there something out there to quickly view a dbase file? Sometimes there are look-up tables(.dbf) to accompany a shapefile. Libre Office Calc can't read it. Maybe a QGIS plugin that can ...
2
votes
0answers
184 views

How can I create random concave polygons for test purposes?

In the context of generating random test data using QGIS (in a shapefile): I can generate random, continuous (adjacent) polygons by first creating n random points using ftools and then generating a ...
10
votes
2answers
4k views

How to rename attributes/fields in a shapefile attribute table?

I would like to rename some fields in my attribute table: Like rename XRF_N3in something else. It seems quite a easy issue but I don't find any information about how can I do that... I've QGIS 1.8 ...
5
votes
1answer
461 views

Is there a python option to “join attributes by location”?

I am trying to perform the function join attributes by location as found on the QGIS menu Vector>Data Management Tools. I am seeking an open source python option for this. I know arcpy has a spatial ...
1
vote
2answers
565 views

Weighted heatmap analysis- density of points, vs density of weight variable

Was just wondering if anyone could help me with a problem. I'm trying to map wellbeing scores (out of 10), using locations from a survey of 15,000 households, using the HEatmap command in QGIS. It's ...
3
votes
2answers
553 views

Is it possible to give 2d contours a Z-height from their attribute table in QGIS? (Or ArcGIS?)

I have a contour data file downloaded from UK Ordnance Survey, which gives 2d contours of an area in gml format (also supplied in .shp format) with the heights of each contour attached to the ...
0
votes
1answer
167 views

Symbol levels in QGIS 2.0 [duplicate]

I have used symbol levels in my current project to define the hierarchy of the different roads. I have tried to make the symbol levels the same in order to achieve the desired look, with no luck. The ...
0
votes
2answers
269 views

“Identity” overlay in QGIS?

I have two polygon layers I'd like to overlay using QGIS or another open source tool. What I want as output is a polygon layer with the extent of one polygon, but with each polygon in that layer ...
0
votes
0answers
149 views

QGis doesn't start anymore on Debian Jessie

I'm running Debian Jessie (Testing) on my laptop. I installed QGis 2.0.1 from QGis stable repos almost a month ago and had no problems till yesterday; now QGis doesn't start, only splash screen starts ...
1
vote
0answers
71 views

Problem in removing dangles in road network [closed]

Im using qgis2.0 , In a given road network i have to remove dangles, for that what should be the tolerance to be added generaly. please help me resolve this issue
2
votes
1answer
394 views

QGIS select feature, “add to current selection” feature

I am trying to perform a feature selection on qgis similar to "add to current selection" interactive selection method in Arcgis Desktop, is that possible? An example: I perform a spatial query and ...
2
votes
1answer
137 views

Mapserver file to localhost

I have installed OSGeo live 7 - Xubuntu I made a nice map using qgis and I have exported the project using RT mapserver exporter. So I created a *.map file in home/user/documents/ How can I load ...
0
votes
1answer
246 views

QGIS data defined properties 'offset' syntax?

So I have a property field called 'offset', type=integer, range=0-359. The intent is to draw an svg symbol that it offset 5 units radially away from the feature coordinate at the angle (in degrees) ...
2
votes
1answer
93 views

Extract characters inside parentheses in QGIS

I have a shapefile of the buildings on my college campus. It has a "name" field that includes the name of the building and then in parentheses the building's campus address (i.e. Health and ...
3
votes
3answers
1k views

How to transform data points from WGS84 to NAD27?

Preface: I have a set of lat and long data points from Google Maps, which I believe are in WGS84. My project data is in NAD27(BLM14). These points are in West Texas, where NAD27 differs from WGS84 by ...
1
vote
1answer
221 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" ...
0
votes
1answer
81 views

Get Index for a group QGIS Python

I am trying to add new layers into a specific group which I can get to work if I know the index but how can I get python to fid the index of a group so it can load the new layer into the group ...
1
vote
2answers
129 views

Migrating to the use of databases over shapefiles in QGIS

I mostly use ArcGIS at work and am digging into QGIS at home and for my business. At work we are phasing out the use of shapefiles and moving towards geodatabases. So I am thinking I should look into ...
2
votes
1answer
589 views

What angular units does the QGIS raster calculator use: Degrees, Radians, Gradians?

I am working with QGIs and am converting a slope raster with values in degrees to a slope raster with values in percent using the raster calculator and the following formula: ...
2
votes
2answers
204 views

It is possible to use different fields for symbology and legend labeling in QGIS?

[Edit : working with Quantum GIS version 2.0.1-Dufour] I wonder if it is possible to use some field to set the symbology and some other to label the map. [Edit 1 : I mean labeling the legend in the ...
6
votes
2answers
153 views

What does feature mean in QGIS?

I cant understand the meaning of feature in QGIS QgsFeature class. How it is related to layer and geometry? I have read qgis documentation but i cant understand what is feature.
2
votes
3answers
275 views

What is the projection of an Android Location class instance?

What is the projection of a Location object returned from the LocationClient by a class implementing the LocationListener interface with a fused provider in the Google Play Services SDK? For example, ...
2
votes
0answers
68 views

How easily can you pick up ArcGIS for Desktop if currently learning through QGIS on a Mac? [closed]

I'm currently trying to teach myself GIS and I have some really basic questions. I apologize if this has already been asked, but I have yet to find an answer to my question. So since I use a mac and ...
2
votes
1answer
1k views

Is it possible to create and run custom R scripts in QGIS 2.0?

I am new to QGIS and most of the tutorials I have found are for 1.x and the overhaul has me confused. I would like to create R scripts and run them in QGIS. I have read here that it's possible using ...
0
votes
0answers
24 views

How to divide my area into adjecent polygons containing 80 points each? [duplicate]

I have a couple of thousand points in my dataset. I need to create clusters that each consists of 80 points. The specific selection of which points to put into a cluster is not critical - only the ...
3
votes
1answer
181 views

How to make a different font and color of text in labels?

Is it possible to make a bold or italic, and change the color of individual words Label? Example: the first line is bold in red text, font 12, second row 10 green italic font
0
votes
0answers
17 views

Can't connect QGIS 2.0 to postgresql 9.3 remote server with postgis 2.1 [duplicate]

I am trying to connect qgis to my postgresql server using the add postgis layer option in qgis dufour. I am not getting any details from qgis other then 'connection failed check settings.' However, ...
0
votes
1answer
110 views

How to create NSIS installer QGIS with Microsoft Visual C++?

I want to know, there is a way to generate QGIS NSIS installer with a Release build generated with Microsoft Visual C++? It is possible to generate the installer in Windows Operating system?
0
votes
1answer
198 views

Merging Multiple Paths

Alright, I'm going to start by using Google Earth terminology because that's where the original need for a solution came up. I have multiple paths (54) that I want to merge into a single path. ...
0
votes
2answers
211 views

Qgis action adding layers using relative paths

in QGIS 2 windows I have some index layers I use for loading raster and vector tiles through an Python action. Currently I am using absolute paths which works fine but I would like to set it up so ...
1
vote
1answer
2k views

Any experience with OSX and Mac OSX Maverics using OSGeo? [closed]

There is a new Apple Release of OSX called Mavericks and my questions are: Will GDAL run? Will QGIS run? Will Tilemill run? Will Mapnik run? Also are there any known issues? A similar question ...
2
votes
1answer
156 views

What does the “Standard Distance” output from the spatial point pattern analysis in QGIS 2 represent?

I have a cluster of points and I am using the Spatial point pattern analysis tool from the processing toolbox in QGIS 2. I am having trouble understanding what the "Standard Distance" output is? It ...
2
votes
1answer
107 views

Problem converting coordinates

I'm trying to convert punctual values from lat/long to EPSG:6372, a projection for Mexico, defined by the Instituto Nacional de Estadística y Geografía (INEGI). I found a converter online but somehow ...
1
vote
2answers
326 views

qgis, simplify parcels to share borders

Is there a QGIS plugin or other method that simplifies parcels to share a common line(border)? I'm pretty sure I read about this some time ago. Couldn't find anything here or elsewhere. I'd like to ...
1
vote
1answer
693 views

Having trouble connecting QGIS with postgres database with postgis extension

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 ...
0
votes
1answer
69 views

Updating matplotlib using OSGeo4W - FOR BEGINNERS

This question has been asked, but I can't seem to find an answer suitable for a non-computer programmer. A link would be great, or a quick 'how-to'. I updated to Dufour (2.0.1) and have run into a ...
1
vote
1answer
292 views

Edit Sketch options for digitizing polygons

Trying my hand at building a methodology on QGIS as opposed to ESRI, and I'm having some issues with simple digitizing of irregular polygons. The edit sketch graphic that appears when adding a new ...
1
vote
0answers
26 views

Export Qgis settings [duplicate]

Is there a way to export my customized settings or copy some xml or config file, in order to install my settings to another computer without me manually changing everything? If this is possible it ...
2
votes
0answers
120 views

Creating water surface from vector line in QGIS

I want to create a raster surface representing the flood level in a creek based on output from a 1D hydraulic model. I receive a 3D profile of the water surface in a creek line as a 3D Polyline ...
2
votes
2answers
1k views

how to for loop a folder to batch clip rasters by polygon using python and QGIS

I am using python and QGIS 2.0. I am trying to clip rasters in a folder by one polygon feature. It's the first time for me using (let's say) "PyQGIS", I was used to arcpy before. Anyway, I don't get ...