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

learn more… | top users | synonyms (1)

1
vote
1answer
321 views

How to create routable network by pgrouting with assign_vertex_id?

I'm trying to create the routable network as per http://underdark.wordpress.com/2011/02/07/a-beginners-guide-to-pgrouting/and use assign_vertex_id. Do I still need to create the node table? How would ...
1
vote
2answers
155 views

Problems with Combining Layers in QGIS

I am trying to add the political boundaries baselayer from http://www.cec.org/Page.asp?PageID=924&ContentID=2336 and then on top add points where I gathered coordinates from Google Earth (using a ...
1
vote
1answer
151 views

How to use QgsVertexMarker in a python plugin?

I am trying to display a vertex marker for a QGIS python plugin I am writing. I am getting a the following error... 'NameError: global name 'QgsVertexMarker' is not defined' canv = ...
1
vote
1answer
98 views

Scaling location points proportionately

I'm trying to get QGIS (1.8) to scale the point markers for each town in a district proportionately to the size of their population (i.e. bigger population = bigger circle). I can get them to vary by ...
1
vote
2answers
733 views

Error adding a delimited text layer in QGIS [closed]

I'm a GIS beginner here. I'm trying to add a delimited text layer in QGIS. The plug-in is okay. I have created a table in Excel, saved as CSV file, imported the file with QGIS, selected the delimiters ...
1
vote
2answers
604 views

Is there a way to get correctly aligned print export with openlayers plugin?

I am a beginner using QGIS (1.8.0 Lisboa) on a Mac (OS X 10.6.8 Snow Leopard). I work on a file with two layers in the following sequence (top to bottom): a vector polygon layer with a few outlines ...
1
vote
4answers
656 views

Why does QGIS not detect the CSV/DBF column headers?

I am trying to import a csv or dbf into qGIS so I can perform a join on a shapefile. However, qGIS is not detecting the first row as header names. I know I've done similar joins before and there's ...
1
vote
1answer
128 views

Raster menu does not have any tools in QGIS

in raster menu in QGIS, only raster calculator is available, how to get other tools, like wrap (reproject) please see the image for help. help me to get this.
1
vote
1answer
699 views

How do I copy all feature attributes to a feature in a new layer?

I'm trying to create a new layer in QGIS based on an existing layer. The new features should have all the attributes of the corresponding features in the original layer. I've been trying to use ...
1
vote
1answer
313 views

Where is the default QGIS Point layer style .qml file installed in Win 32?

Where is the default QGIS Point layer style .qml file installed in a Windows 32 bit installation? I have done a search on *.qml and can only find four python plugins styles.
1
vote
1answer
492 views

How to create new columns in QGIS by writng Conditional query on other columns of attributes table

First of all, sorry, I couldn't phrase my question better. So I want to be able to add a new column in my attributes table, say B, and it's value should be 1 if Column A's value is 1 and 0 if Column ...
1
vote
3answers
2k views

QGIS Raster Calculater Syntax

I am trying to use the raster calculator in QGIS to combine a number of rasters. I want to calculate a mean, this is easy: (raster_1@1 + raster_2@1 + raster_3@1) / 3 I then want to create a max. ...
1
vote
1answer
659 views

Create buffer-lines in QGIS alongside Vector lines

I am currently doing a map of a farm, to see which roads needs to be repaired. Those roads are either one sided fenced, on both sides fenced or not fenced at all. I want to make buffer lines around ...
1
vote
1answer
860 views

How to draw grid cells in QGIS?

I have one ASCII text file with eight columns. The first four provide the x-coordinates (e.g. longitude) of the four corners of a grid cell, while the last four provide the y-coordinates (e.g. ...
1
vote
1answer
103 views

Should a GDAL Plugin be the same version as GDAL aready built into QGIS

Should a GDAL Plugin be the same version as the GDAL that's aready built into the QGIS version installed? Or,can another different version of GDAL be built and it installed as a Plugin for QGIS, ...
1
vote
2answers
798 views

Import Civil 3D DEM to ArcMap or QGIS

I have some survey data exported from Civil 3D in both dtm and dem formats. I thought the I would be able to use the dem more easily, but I think the format is different from a USGS DEM. Is it ...
1
vote
1answer
114 views

QGIS CSV file sorts low numbers as high

So I have numbers that range from 5 to above 50, and when I sort these from least to greatest, the numbers less than 10 are treated as higher than anything else. It also does the same when I try to ...
1
vote
1answer
179 views

Why won't QGIS let me write to a file?

I am writing a QGIS Python Plugin. I am trying to write data to a file using with open("filename.txt", "w") as f: f.write("file text.") QMessageBox.information(None, "Test", "Written to file.") ...
1
vote
1answer
96 views

Easy Labels do not show when opening project on another machine

Love the easy label plugin, once I got the hang of it. I opened the project file on my desktop after setting up all the labels on my laptop and they do not show. I assume they will once I open the ...
1
vote
1answer
208 views

Is PgQuery for QGIS still available?

I was wondering if PgQuery for QGIS is still available. I am trying to install it on some new machines with QGIS 1.8.0 and I can not find it in the Python Plugin Installer. Does anyone know of a ...
1
vote
1answer
188 views

Is the GIS Repository In Ubuntu in a different stream than the main repository?

I was checking out this: https://wiki.ubuntu.com/UbuntuGIS and it outlines how to install PPA for GIS. I performed a basic apt-cache search on a few things and QGis and mapserver are available. Such ...
1
vote
1answer
28 views

Revise from repository on standalone Win7?

I'd like to fix the bug in QGIS whereby starting QGIS offline or on a slow connection can kill it, using this revision: ...
1
vote
2answers
601 views

What's the correct csv format for MMQGIS Join by attribute?

When trying to join attributes from CSV-file with MMQGIS, I currently get the error message: File inaccessible or in unrecognized CSV format /Netzplanung/Truck_park/trkbuspk15_2.csv Tried with ...
1
vote
2answers
567 views

What is the default unit for QGIS scales and how do I set it to KM?

I want to render a specific layer only between 0-12km but have no idea how to set it in QGIS because the scales dimensions are high numbers. My project and layers CRS is EPSG:2039 Thank you .
1
vote
1answer
623 views

How to import GEBCO bathymetry into QGIS?

I'm experiencing problems with the import of bathymetry data in QGIS, which I downloaded freely from GEBCO or NOAA. The problem is that if I import the grid (either with .nc or .asc extension, or if I ...
1
vote
1answer
262 views

Merging data in Quantum GIS

I have a set of postcode boundary data that currently goes down to the most detailed level possible, like this: AB1 2CD I would like to 'simplify' the data so that it just shows the first part of ...
1
vote
1answer
102 views

Transform csv-coordinates into area

I'm working with an inventory of a species in Southern Sweden. I have recorded my findings (together with coordinates, name of the species and year of finding) and created a CSV-file with i have ...
1
vote
2answers
154 views

Is it possible to import SAGA colour styles in QGIS?

iam still using QGIS and SAGA independently in my productive use (despite the excellent SEXTANTE toolbox, which is sometimes a little buggy). SAGA has some very nice default styles and i am wondering ...
1
vote
1answer
449 views

How to add a progress bar to a python plugin?

I would like to add some type of progress bar to my Qgis python plugin. Can someone point me to an example?
1
vote
2answers
2k views

What do I need to change to get scale bar units other than degrees?

Measurements done in QGIS on my project are done properly using whatever unit is set in: Settings > Options > Map Tools > Preferred measurements units but the scale bar decoration and scale bar in ...
1
vote
1answer
145 views

Taking a 'custom' map and transforming its x/y co-ordinates to 'real' long/lat co-ordinates?

I was wondering if someone could help me out with a little project I'm working on. I'll try to describe what I'm trying to achieve - if it doesn't make sense, please let me know. I have in front of ...
1
vote
1answer
200 views

Count the number of symbols in a 'new symbology' renderer from pyqgis

Background : I create a lot of symbology using 'saturation' ramps - for want of a better term, e.g. where the hue and value of each symbol stays the same, but the saturation changes. I couldn't figure ...
1
vote
1answer
400 views

Can I use a PNG point marker?

I want to style a point layer from png file. Can i do this in quantum gis?
1
vote
1answer
136 views

QGIS and Ubuntu 'browse' dialogue causing crashing

Below is an image of 'the suspect dialogue' in Ubuntu that when you encounter it in QGIS you are most definitely going to crash the application. http://ow.ly/i/ZGNc/original You find this ...
1
vote
1answer
2k views

QGIS: creating lines from starting to arrival points?

Is it possible in QGIS to create lines from a table storing the X,Y-coordinates of starting and arrival points? So that a line.shp is automatically created? Or exists a plugin to achieve that? ...
1
vote
2answers
192 views

How to apply v.transform on a set of vector layers (GRASS 6.4)?

I have 64 vector layers, all of them must be warped using the v.transform module; the pointsfile is the same for all vectors. How can I apply the transformation recursively to all layers? I'm not ...
1
vote
1answer
491 views

Problem with Orfeo Toolbox integration in QGIS

I'm getting this error: OTB execution console output '"C:\OSGeo4W\bin\otbcli_MeanShiftSegmentation"' is not recognized as an internal or external command, operable program or batch file.
1
vote
1answer
69 views

stacked colours according attributes

I have a hierachical List of attributes e.g. column (1) S (2) SD (3) SD0 or (1) A (2) AN (3) An1 etc. So there is one S with several SD s and several SD0 in the attribute table. When I display column ...
1
vote
1answer
225 views

It is possible to add A* to the pgrouting plug-in?

I am using pgrouting layer plug-in as described in this post: http://underdark.wordpress.com/2011/12/18/osm2po-part-2-pgrouting-on-osm-the-easy-way/ I am now able to calculate the shortest path using ...
1
vote
1answer
387 views

QGIS error when open project when layer via accesses the database

I changed from QGIS 1.7.3 to 1.8.0. Problem is that I can´t open QGIS Projects, QGIS crashes when there are layers involved loaded via access-database connection. I used eVis. What can I do?
1
vote
1answer
150 views

QGIS Crashing in Ubuntu / 'Save As' browsing

When trying to create a new shapefile in QGIS on Ubuntu, I get a crash whenever I browse to a folder to save the file. Has anyone else experienced this?
1
vote
1answer
186 views

QGIS Crashes when writing to PDF

8 Lisboa. I have a very large mapper. Formatted to A1 size with a large area and constraints laid across it. Everytime i try to write to pdf it crashes. It is just due to the size of the file. I ...
1
vote
1answer
324 views

python qgis.core import error caused by spatialite libraries

I have an error when trying to import qgis.core to python: >>> import qgis.core Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: ...
1
vote
1answer
486 views

Is it possible to convert a Geoserver SLD to Quantum QML format?

I have a web application which runs on Geoserver. I am migrating my application to desktop and am struck at applying the same color schemes and symbology. I am not able to find a way to convert SLDs ...
1
vote
1answer
2k views

Exporting Symbology from ArcGIS for Desktop to Microstation or QGIS?

I am using ArcGIS 10.1 for Desktop and trying to figure out how to export my symbols of elements in ArcGIS to CAD or QGIS readable format. The problem is, that I can export symbology to a Style, or ...
1
vote
1answer
185 views

what raster format for r.los in qgis

What raster format should I use to create viewsheds in QGIS using the grass r.los plugin? I am using the Ordnance Survey Opendata DTM (tried both ascii and shapefile formats) and srtm geotiffs but ...
1
vote
2answers
365 views

QGIS GPS position after entering attributes

I would like to be able to fill a form and, before, during or after, be able to cath a GPS point. I already know the GPS extension but I have to catch the point and enter attributes after... Idea how ...
1
vote
1answer
292 views

Help needed for georeferencing in QGIS

I am new to Quantum GIS. I just happened to browse to a tutorial on georeferencing in QGIS and I found it easy and interesting. I also calibrated the map and saved the points as per WSG84 standard. ...
1
vote
1answer
453 views

installing module in embeded python in qgis

I'm newbie to Quantum GIS and Python. I'm using QGIS in windows platform. How I can install module for python embedded in QGIS? Also, how can I run embedded python from windows directly? Thanks
1
vote
1answer
504 views

ReportLab integration into QGIS returns error message “no module named reportlab”

I want to use ReportLab in my own plugin which I have written for QGIS. I have installed ReportLab for the python versions 2.4, 2.5 and 2.6. The package is respectively installed into the ...