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

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1answer
64 views

Raster data type as input in processing algorithms

Why the processing algorithms run just with input files located in QGIS desktop? Is there any way to work with directories? I am developing a plugin and I am using processing algorithms but the ...
2
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1answer
79 views

Valid values of mollweide projection in QGis

i just imported a vectorlayer (without any reference points) to qgis as mollweide projection to save it to longlat. What i am wondering about is a mathematical problem: Not every x,y coordinate on the ...
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0answers
179 views

How to Display a MapGuide WMS in QGIS Valmiera 2.2

I have no idea why my QGIS Valmiera cannot display the aerial photo via the WMS(MapGuide). The QGIS Dufour 2.0.1 & QGIS 1.8 can display the aerial photo without problem. The QGIS Valmiera can ...
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0answers
32 views

Is ther open source tool for calculating Getis-O-ord (ARCGIS) and able to customize in own platform

i would like to know is there any open source tool for calculating Getis-O-ord(ArcGIS)? If so can i customize for own application or can i write my script within that application like qgis.
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2answers
3k views

how to install QGIS 2.2.0 on mac OS 10.6.8?

Does someone know how to install the latest QGIS on a mac os 10.6.8? The dmg package available on http://www.kyngchaos.com/software/qgis does not run on my OS version. I was only able to find a ...
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1answer
41 views

QGis 2.2 layer buggy in 2.3 master

Wondering if anyone else can reproduce this kind of problem? I dual boot windows 7 and ubuntu 13.04 with QGis on both. Have updated QGis to latest on both, and created a layer in my project in 2.2 in ...
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1answer
83 views

QGIS WCS client with clip parameter

Can be defined bbox parameter in a WCS service? I require trimming the layer coordinate in a box, I'm trying to prove the following WCS, but shows the entire layer globally: ...
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0answers
124 views

What might slow Inkscape down when working with QGIS SVG or PDF output?

When I import an SVG or PDF exported from QGIS print composer (2.2.0) into Inkscape 0.48 the vector graphic has large black lines and squares. These change size when I zoom in and out, and the graphic ...
3
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1answer
921 views

Is there a QGIS bezier curve tool?

I'm a recent convert to QGIS but have been confused about the lack of support for drawing curved shapefiles, especially when Arc has almost too many. A lot of the work that our consultancy do is based ...
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0answers
77 views

How to do the “display route events” from Arcgis, in Qgis

I'm working with Arcgis 10.1. In Arcgis there is a feature called "display route events" from tables, and I want to do exactly what that features does, but in Qgis. I'm using Qgis 2.0.1. What this ...
2
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1answer
82 views

Alternating ESRI scale bars in QGIS

I'm a recent convert to QGIS from arc and think it's amazing, so much more efficient and usable. It also doesn't crash constantly which helps me keep some of my sanity. I was having issues finding ...
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1answer
105 views

Creating an OVF file for connecting Oracle and QGIS

I'm trying to create an OGR file that can be opened in QGIS that pulls in vector data from an Oracle Database. I've tried a few combinations of things but can't seem to get anything to work. I've few ...
2
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1answer
413 views

query / filter on attribute tables with external tables joined

i tried to do some queries on joiend table fields ... i've got/found some answers concerning version 1.8 - which result in "use select + export to create a combined dataset" so i just did some tests ...
4
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1answer
740 views

“Couldn't load PyQGIS” Error running QGIS on Ubuntu 14.04

I have installed QGis on Ubuntu 14.04 from the QGis stable repository; it went fine with no errors reported. But when I launch QGis I get this huge window with the following message: Couldn't load ...
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1answer
63 views

Atlas Composer - how to avoid tabledata from other objects?

I have a layer with multiple objects from where I want to list up the tables with a printoutput for each object. Some of the object are close to each other and therefore the tables of the objects ...
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0answers
58 views

QGIS python plugin: PyQGIS for spatial join

For a QGIS 2.0 and 2.2 Python plugin, I am trying to update one layer's field attribute with another layer's field attribute based on geometry function QgsGeometry.within(). My first layer is a point ...
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0answers
68 views

Method for identifying upstream segments

I need to add to the attribute table of a stream network layer a column that can identify all upstream segments that contribute to the segment (for each segment). My best idea at the moment is to ...
2
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1answer
109 views

More presentable style class range values, faster

This is as much feature suggestion as it is question: Is there a better way to generate attractive/presentable style class ranges? Currently I have 5 similar datasets. Lets say the values for the ...
0
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1answer
40 views

QGIS “transform error” after downloading from OpenStreetMap

Beginner's question. I am working on this tutorial: http://www.qgis.org/en/docs/training_manual/vector_analysis/basic_analysis.html After selecting WGS84 UTM zone 34S in Project Properties, I receive ...
3
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1answer
135 views

Is there an escape option for single quotes & apostrophes in QGIS?

I'm trying to use the Data Defined symbology in QGIS ver 2.2. Some of my data has single quotes/apostrophes. Since the string must use single quotes, is there an escape option I can use for the field ...
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1answer
72 views

QGIS Analyst Create Finished Product for MapInfo Client

I use Esri in my day job and am learning QGIS for work on the side. I have a Client that uses MapInfo for creating Posters and Presentations. I have never used MapInfo. I am digitizing geology data ...
1
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1answer
59 views

QGIS how to add string field

I have a few point shapefiles. I want to merge them, but first give each point a certain type according to shapefile. How do I add a String field, all with the same word? (changing the field type ...
0
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1answer
84 views

Sql to view points of intersection with line not working

I have two tables one called test lines and other points called testepoint with some geometries drawn in QGIS to test my sql. Are as in the image below: I want to select the points that inteceptam ...
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2answers
69 views

How to define the symbology used in QGIS print composer without using separate styles for screen and print

I use scale-dependent symbols for mapping (rendering Openstreetmap vectors as it happens). For instance paths show up when zoomed closer than 1:50000, but only roads show when zoomed out. The rules ...
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1answer
117 views

Adding tracks to gps with QGIS feature attributes as name

I am attempting to send a vector layer to a garmin gps in QGIS. I am using the GPS Tools extension and have created a new GPX layer. I can add waypoints without any issues, but when I copy features ...
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0answers
63 views

Sort polygons from north to south in QGIS using 'graphical modeler'?

I'm building a model in 'graphical modeler' in QGIS 2.2. I want my model to clip a polygon layer and give the polygons coordinates so that I could sort them geographically from north to south. After ...
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0answers
166 views

Creating custom CRS for India toposheets using QGIS?

Indian toposheets (pre-2000 series) of 1:50k scale are in Polyconic projection, with Everest 1956 spheroid and India-nepal datum. How do I create a custom CRS in QGIS to represent this, so that I can ...
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0answers
21 views

Calculating std dev for ruggedness using QGIS?

I have a DEM raster image and a vector layer with 200+ grids. Using QGIS, I got the terrain ruggedness index for the DEM layer. Now, I want the std dev (i.e. variation in ruggedness) for each of the ...
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0answers
89 views

Batch join non-spatial csv to shape files

I have 173 point shape files from soil testing and 173 non spatial csv files with lab ressults (one csv for each shape file) that need joining. The files are located in a library with folders named ...
1
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1answer
107 views

Is there any issue using R scripts with sextante processing framework?

I want to use R scripts from the module Sextante treatment QGIS , but I have many difficulties to configure the module in Sextante . Following the procedure described in the official documentation of ...
2
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1answer
404 views

How do I create a set of equally spaced points along a line using QChainage and export these as latitude and longitude coordinates in degrees?

In QGIS 2.2.0, how do I create a set of equally spaced points along a line using QChainage and export these as latitude and longitude coordinates in degrees? I am using the QChainage function in QGIS, ...
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2answers
37 views

How to set symbology based on an attribute of a 1-N table

Now, it is possible to edit geographic features and add elements in child tables using 1-N relationships. I want to construct a stacked - symbology which allows me to represent the multiple ...
8
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5answers
840 views

What cartographic line symbol could make a coastline represent water like this old map?

I live in a coastal area with lots of islands. Sometimes with a black and white map it's hard to distinguish land from sea. So I'm trying to replicate this old map's style. I'm trying to do this in ...
2
votes
1answer
625 views

Elevation color ramps for DEMs in QGIS

I need to color a DEM that I have loaded in QGIS 2.2. I'd like the DEM colors to represent different elevations, something like: https://dl.dropboxusercontent.com/u/26086662/color_ramp.jpg None ...
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1answer
37 views

How to determine aspect areas for different elevation bands in a basin in QGIS?

I am working in QGIS and have the dem rater, the vector basin boundary, the hypsometric curve and the aspect raster. I need to determine the north, south and east-west facing areas in each of the 15 ...
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0answers
32 views

Set Default Transparent Pixels in QGIS?

Is there a way to set QGIS to automatically load in images with no data values of (0,0,0) as transparent instead of black? I've looked through the forums, tried saving a .qml file out, looked through ...
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2answers
183 views

Georeferencing Vector Layer (shp) from Mollweide Projection to Custom CRS in QGis

the title might be a little complex. Its part of a massive project: I'm working on a fantasy world; a map, to be more specific. I basicly just started to paint a world map in Photoshop, but over time ...
1
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1answer
175 views

autocad-map of real estates with own coordinate system and information to be converted to use it in QGIS

I have a question regarding CAD and QGIS, but unfortunately I don't have a clue of CAD. Here it goes: Real estates data has been mapped. There are several reference points surrounding the area. So ...
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0answers
177 views

How do I use the new USGS topo WM(T)S in QGIS?

The WMS link for "Scanned Topo Maps from USA Topo" in http://viewer.nationalmap.gov/example/services/serviceList.html no longer works (HTTP 400). ...
2
votes
1answer
233 views

How do I plot a line on a map, or obtain the latitude and longitude coordinates of such a line, that is 120km north of the US-Canada border?

How do I plot a line on a map, or obtain the latitude and longitude coordinates of such a line, that is 120km north of the US-Canada border, including parts of the border that cross water? (I managed ...
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2answers
122 views

Output map of only 50m-100m contours [closed]

I´ve got the "OS Terrain 50" contours/spot-heights dataset. I would like to output a series of maps with everything above 0m, 50m, 100m etc. from a region. I know almost nothing about GIS, but have a ...
2
votes
1answer
176 views

How to creat multiple rings between two circular buffers?

I am working with mathematical-ecological modeling and I am also a new user of QGIS Software. First I am creating 3 circular buffers with same center (shape center) covering a region with roads (shape ...
3
votes
1answer
327 views

Converting models from QGIS to Python scripts?

I want to automate some tools for QGIS 2.0.2 using Python. Previously I have used ArcMap for automating tools and now i want to use QGIS. In ArcMap I used the ModelBuilder, and more specifically the ...
3
votes
2answers
461 views

TIF format to view a vegetation Map with QGIS

I'm a new user of QGIS and I'm trying to view a map present in an online GIS dataset. There are several formats for this dataset and one of them is a TIF folder with several files: .tif, .tif.aux, ...
2
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5answers
2k views

Unable to install ECW support on lubuntu 14.04

I try unsuccessfully to install the ECW support (mainly to use ECW file in QGIS 2.2). We attempt to follow and adapt the howto provided by makina-corpus. My first supprise was the repository ...
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0answers
54 views

PostGIS automatically creating geometries after importing using QGIS DB Manager

I have a shapefile consisting of linestrings, in which some of the features have null geometry. Yet, after importing it to PostGIS, using QGIS' DB Manager, a geometry is created for those features ...
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1answer
185 views

Add GPS tracks directly to a PostGIS table

Disclaimer: I am a total GIS newb and I have a use case I have not seen elsewhere. Background: I drive country roads looking for old building, cemeteries, school houses, etc and I record the ...
0
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1answer
74 views

Is it possible to change the style on a WMS layer using QGIS?

Apologies from a QGIS beginner but I have added a WMS layer of polygons to fill in the gaps of an existing data set I have. the problem is that I want all of this data to have the same style (colour ...
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1answer
66 views

Applying styles to categorized layer using QGIS

Apologies if this is an easy question from a QGIS novice but I have categorised a layer so I can attach reference numbers and names to the various points but I would like all the points to have the ...
1
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1answer
321 views

Intersect between polygonal shapefiles error

I'm encountering a problem when I try to intersect two different shapefiles. They are all new shapefiles I created to descibe the land cover and the land use of a city. The problem occurs when I ...