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

learn more… | top users | synonyms (1)

4
votes
1answer
343 views

How to print pie charts in QGIS?

I added pie charts via text-file to my map. When printing the map they get lost. Does anyone know how to print them? QGIS also seems to delet some charts, when there are to many at one place. Does ...
2
votes
1answer
407 views

Apply QGIS Style to osm-File like in Open Cycle Map, Landscape Base-Layer

I try to mimick a rendering style like in Open Cycle Map (landscape base layer) in QGIS. However, I'm not able to find certain elements (i.e., wood and rivers) that are used in Open Cycle Map but seem ...
5
votes
1answer
1k views

How can I Setup Python to recognize QGIS

I want to use QGIS and work with Python out of the console, but I'm having troubles letting the system recognize the paths of some DLLs. Since I couldn't find a good answer on the web, I wonder if I ...
9
votes
1answer
705 views

How can I see the coordinate transformation parameters in QGIS?

How can I see (and edit if possible) the transformation method and parameters used by QGIS for "on-the-fly" transformation, and then for saving data in another CRS? Like in ArcGIS? Here is the ...
4
votes
4answers
943 views

How to Digitize Free Satellite Imagery in QGIS - Alignment issues with Openlayers Plugin

I am trying to digitize OpenLayers data (such as Google satellite imagery) with no success. Whenever I try to move or zoom the canvas the vector layer I digitized loses the position relative to the ...
3
votes
1answer
496 views

How to set up a background map in WGS84 projection for interactive map?

I've started developing my own interactive map and I have some things which are not clear to me. I heard that OSM, Google maps and all similar maps use Google Mercator projection. But if I use that ...
1
vote
0answers
165 views

ODBC connection to Sybase SQL Anywhere database

I have my GIS data in ESRI personal geodatabase, and my attributes in a Sybase SQL Anywhere database. I would like to make a join between my GIS data and my tabular data, but don't understand how to ...
6
votes
2answers
224 views

Why is my Natural Earth map not shown correctly in QGIS? (strange circle; only Caucasian Sea shown)

Using the world map data from Natural Earth I have some problems with the correct displaying in QGIS. Shapefiles added: 1:10 Admin Countries 1:10 Oceans As you can see in my screenshot, there are ...
2
votes
0answers
63 views

Qgis don't show geometries

When I select a object in a particular layer using qgis in order to get information about it, this object don't get resalted in red and in the qgis log a get the following error: not found space ...
1
vote
1answer
404 views

Can a QGIS project (.qgs) be uploaded to work in map viewer in GIS Cloud?

Title says it all. Can a QGIS project be uploaded onto GIS CLoud to display all the properties i have asked it to display in QGIS? if not is there an equvilant GIS Server i can upload previous QGIS ...
5
votes
1answer
1k views

Is it possible to convert ArcGIS .mxd to QGIS .qgs without having ArcGIS installed? [duplicate]

I was reading How to convert an .mxd file to a .qgs file?. It looks as though this only works with ArcGIS 10. I would like to do this, but am unable to install things on the computer that has ...
3
votes
1answer
282 views

Clarification of Map Scale

I need some clarification. I have a map the is set to the scale of 1:6000. In Settings>Project Properties, under the General tab I have the Layer Units set to feet. Therfore I assume that means the ...
7
votes
2answers
209 views

How to create vertical labels in QGIS?

How to create vertical labels (each label in new line) like: 1998 150 pipe name and not horizontal: 1998 150 pipe name
1
vote
1answer
597 views

How to connect to MySQL from QGIS in Ubuntu10?

I have just installed Quantum GIS 1.8.0 on my Ubuntu 10. I want to add a MySql table as a data source but I can't see any options for connecting to mysql. Can any one guide me how to connect to ...
2
votes
0answers
123 views

Install Georeferencer Plug-in QGis 1.7.0 OS X

I'm trying to install the Georeferencer plug-in in QGis 1.7.0 on Mac OS X (10.5.8). However the plug-in doesn't show up in the list. I have used "enable 3rd parties directory" and I have checked ...
5
votes
1answer
186 views

How do I make the scalebar accurate when I am working with a google satellite image in QGIS?

I start a project in QGIS. I set the CRS to anything (in this case I use EPSG=26918 a NAD83 datum). I also enable on the fly projection. Then I import a vector. In this case a kml, which I believe is ...
3
votes
2answers
881 views

How to install shapely for python 2.6 (Mac) NOT 2.7?

I'm trying to use Polygonizer plugin inside QGIS, but it needs Shapely to work. I've installed Shapely (pip install Shapely) but that's for python 2.7. QGIS works with python 2.6 (on Snow Leopard) and ...
4
votes
1answer
207 views

What is the 'Layer' box in 'Save Vector Layer' good for?

In QGIS, in the 'save vector layer as' window, under OGR creation options, what is the 'Layer' box for?
5
votes
1answer
1k views

How to get labels to diplay in Google Earth after saving to KML?

When saving a QGIS layer as kml, is it possible to have labels be displayed when opened in Google Earth?
3
votes
1answer
549 views

How to keep layer style/symbology when saving as KML?

When saving as a kml, is it possible to keep the style of the QGIS layer? I have tried a couple plugins that have been mentioned on here: qgis2kml ('format not yet supported') and qgis2google2 ...
-4
votes
2answers
628 views

QGIS 1.8.0, 3.68 RAM, 2.4GHz — Slowwwww performance

What can I do to speed up QGIS panning and zoom in/out? I did not include any layer information in my question because it is still subjective. It's just that I cherish having an open source gis ...
5
votes
1answer
365 views

How can I export big SVGs for further use in Inkscape?

I am trying to export as an svg from Quantum GIS and import into Inkscape. However it is failing to Import. Inkscape comes up with the error 'Failed to load the requested file'. The files are quite ...
2
votes
2answers
333 views

How to avoid exceeding latitude and longitude limits, when importing a .csv file?

I am currently working with a project with "on the fly"-projection (WGS 84 / UTM zone 32U). Now I want to import a csv. file with points, which have a longitude and latitude using the "Add Delimited ...
3
votes
1answer
874 views

Can I create a 3D model in QGIS or is there some model for 3D city model?

Can I create a 3D model in QGIS or is there some model for 3D city models? I need these information for my project.
2
votes
0answers
162 views

Intersect errors, memory issues in QGIS

my datasets are: Track_02(simple road polyline shp) ***intersected with*** road_cat_cls(polygon for road categorization) elev_rcls_poly(polygonized classified DEM) slp_rcls_poly(polygonized ...
5
votes
2answers
2k views

How to use QGIS Zonal Stats Plugin from Python Console?

I am using the Zonal Stats plugin in QGIS to extract raster statistics from overlaying polygons (I have shapefiles of species distribution and I want to extract environmental data from within each ...
4
votes
3answers
261 views

Time-aware layers WCS Service

I am currently developing an application that requires to display raster images over a period of time (I'm looking how Hurrican Sandy progressed). While investigating, people have suggested that I ...
7
votes
3answers
4k views

How to determine the centroid of polygons?

I have a polygon vector and I want to quickly attain the centroid of this polygon for insertion in a text document. I am working with QGIS. I searched through other questions and although some are ...
3
votes
1answer
267 views

How to get correct scale values?

The scale of my map is wrong, no matter what coordinate system I use in my project. The map and all objects show the correct coordinates but the scale of the map shows nonsense and the measurement ...
4
votes
2answers
80 views

Where can I set the BufferColor property for labels in QGIS?

The accepted answer to this question suggests that the buffer color can be set as a data defined label property. However, in the Layer Properties > Labels > Advanced tab, the only options I can see ...
6
votes
1answer
414 views

QGIS define hexagon area around mapped points

I am using QGIS to map a number of radio antennas (for mobile network). Once I have the layer of the sites (done), I would like to assign to each site a coverage area (envelope). I could achieve that ...
2
votes
0answers
72 views

Spatial difference with vector functions [closed]

I have 2 shapefiles, 1 municipal boundary, 1 x properties (3000 Geomertien) I would like to form a spatial difference, this unfortunately does not work with the vector functions of QGIS. thank you ...
6
votes
3answers
2k views

What is XYZ format in QGIS?

Basic question, but I have been asked to export data to an XYZ format. Is this the same as CSV files. I am using QGIS 1.8.0. So i am presuming i select the data I want to export, right click its ...
1
vote
1answer
518 views

Is QGIS 1.8 available for Ubuntu? [duplicate]

Possible Duplicate: How to install QGIS on Ubuntu 12.04? Title says it all, and if so, how do I go about getting it? I currently have 1.7 Wroclaw installed via the Ubuntu Software Center, ...
2
votes
2answers
265 views

QGIS' georeferencer layer doesn't appear?

I use QGIS 1.8.0 for Linux, and I want to draw roads manually on the map. So according some tutorials, I use Raster>Geoferencer>Geoferencer to import a bitmap image including roads, and set ...
4
votes
2answers
829 views

How to generate Tiles with QuantumGIS or Mapnik

I would like to know how to generate Map Tiles using QGis. I have heard that it is possible to create tiles using QGis, only, I don't know how to do that. Googling did not work for me since I am not ...
8
votes
2answers
789 views

How to create svg symbols that have modifiable fill color, stroke color and stroke width?

I want to create some svg symbols for Qgis using Inkscape, those symbols must have attributes as described in the question. For the last two days, I have been experimenting as instructed by Sourcepole ...
9
votes
1answer
2k views

How to handle multiple map frames with different layers in one print layout?

Often I need two (or more) map frames in map layout to present different data next to each other. It is easy to make multiple map frames in QGIS Print Composer. BUT... It is in the nature of my work ...
3
votes
1answer
52 views

How to load multiple images with the same CRS?

When I add several images to QGIS 1.8 it asks the coordinate reference system for each one. There are several seconds in between the dialog and it is not easy to just continue working as the dialog ...
1
vote
1answer
848 views

How to use field calculator for area calculations in QGis? [duplicate]

Possible Duplicate: Calculate area between contour lines on a DEM with Qgis 1.8.0-Lisboa Based on a DEM of a whole country I have reclassified altitudinal bands with steps of 100 metres ...
3
votes
1answer
145 views

How to calculate the percentage of a Line through Polygons?

I have a straight line which runs through a bunch of polygons, which don't have spacing between them (border to border). Is there an easy way with QGIS to calculate which polygons it passes and by ...
11
votes
2answers
451 views

Moving points onto lines (~neighborhood)

I do have two vector layer, of which one is a point layer based on "events" by remote sensing and the second one is a line layer from local research. In my case these are earthquakes and tectonic ...
3
votes
1answer
99 views

Is it possible to create road-type dependent 'shields' in QGIS?

In QGIS, I need to place road numbers on a map (they are point labels) in solid rectangular boxes to make them stand out. Ideally they need to be the same colour as the road they refer to, so a ...
2
votes
1answer
86 views

Is the QGIS blog broken?

I would like to use the QGIS API in my own program to display maps .... So I thought I would find some tutorial here : http://hub.qgis.org/wiki/quantum-gis/Writing_custom_Applications_with_QGIS_API ...
3
votes
2answers
310 views

Print Map as Tiles in QGIS or using any software.?

i need to print a detailed map, on a street level zoom of Metro Manila. i figured to do this i need to download map tiles, but that will be a breach on map usage in OSM. then i found this website, ...
3
votes
1answer
196 views

How to determine error radius of given points

I am running QGIS 1.8.0 on a 64-bit Windows 7 platform. Given multiple points with different (but close) coordinates, how do I automatically create a new point that programmatically takes into ...
14
votes
3answers
353 views

Is it possible to use symbols instead of colours to visualise raster cell values?

I have a raster image (GeoTIFF) with integer values. I know how to visualise raster values in QGIS using colormaps or similar, but I would like to assign symbols to each colour value instead - just ...
1
vote
1answer
290 views

QGIS project on QGIS server — cannot load wms layer

I've created a qgis project on QGIS 1.8, copied it onto the QGIS Server, and am trying to load the project as a WMS Layer back into QGIS. There is one vector layer in the project. Paths have been set ...
7
votes
2answers
343 views

How to perform enhancement operations on an satellite imagery in QGIS?

I am a new user of QGIS please suggest how to perform image enhancement operations on an satellite imagery like ratioing, contrast stretching, edge engancement, filtering etc. in QGIS?
9
votes
3answers
2k views

How to programatically check for a mouse click in QGIS

I want to know how to check for a mouse click in QGIS. I am trying to write a python plugin and want to provide functionality similar to the "Select Single Feature" tool that already exists in QGIS. ...