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

learn more… | top users | synonyms (1)

5
votes
2answers
400 views

How to identify polygons that have shared boundary?

I have hundreds of polygons that represent plants geographical ranges around the globe. For each species I have both a shapefile and collection of findings as points. I would like to analytically ...
2
votes
1answer
754 views

Reprojection from WGS to Slovenian Gauss Kruger in QGIS

I have gpx file (track) in WGS84 (EPSG: 4326) coordinate system from Garmin GPSMAP 62 which is right projected in BaseCamp and MapSource. When I save track as *.GPX and import it to QGIS and use ...
0
votes
1answer
156 views

FieldPyculator Plugin - How to concatenate fields?

How can i concatenate two fields using pyculator plugin? There is any document with all pyculator functions that i can use in "field expression"?
2
votes
1answer
159 views

Difference between NAD83 Indiana SPW in QGIS and ArcGIS for Desktop?

It seems ESRI and QGIS don't have the same definition for my most commonly used projection, NAD83 StatePlane Indiana West (US ft). When I create data in an ESRI product the projection shows up in ...
2
votes
1answer
385 views

Is there lat/lon grid option in QGIS?

For example, I have georeferenced layer loaded and I want lat/lot grid or at least some ruler in QGIS display canvas, to suite me as a helper. It looks like only reference is cursor tracking in status ...
4
votes
1answer
220 views

How to save space in the legend and write the layer name besides the symbol?

I'm starting using QGIS to make a project for university and I am with a problem on configuring legends on Print Composer. The thing is I want the text of my legend to appear after the ...
8
votes
4answers
2k views

How to use Z-Coordinate in QGIS?

I was mapping an area in Namibia and also tracked a lot of paths on my way with my Garmin device... so I thought it would be nice to see height differences in my area (esp. interesting in the ...
2
votes
2answers
503 views

UK Postcode District Aggregation

I've had a request recently to generate a map which includes UK Postcode districts, ie aggregations of postcodes based on the first section of the code (NW2, B1, E11 etc.). From what I've read, these ...
5
votes
3answers
679 views

Does QGIS have something like the MS Office macro recorder?

I would like to use python console in QGIS to automate tasks. Is there something like a macro recorder in MS Office to get the python commands?
2
votes
1answer
235 views

Having trouble linking VS 2008 C++ application

I am trying to resolve a few last exgternal link references in my program. Help in locating the correct libraries for Windows would be thanked. I may have incorrect versions of some of my current ...
4
votes
1answer
203 views

Which WMS is easiest to work with when using QGIS?

I'm using QGIS to style shp files. Currently I'm running GeoServer but not all the QGIS styles are imported to GeoServer (although its really easy to maintain it because of the layer preview and the ...
3
votes
1answer
798 views

How can I save the label style as SLD in QGIS?

In QGIS there are 2 options to style labels. Using the style properties. Using the label in the toolbox When I dbl click layer -> styles -> save as SLD , the style of the label isn't saved in ...
6
votes
2answers
178 views

How to sample a 3D raster along a 3D path (or 4D raster along 4D path)?

I have a 3d raster dataset of atmospheric variables (lat x lon x altitude). I would like to sample this raster dataset along a 3d path. Any idea how I can achieve this, preferable with qgis or ...
0
votes
0answers
88 views

QGIS MergeShapes Error

I am using the MergeShapes plugin with QGIS 1.8.0 on a Windows 7 computer. The issue I am having is when I perform a merge from a directory based on one geometry type, and then switch the geometry ...
1
vote
2answers
453 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 .
3
votes
0answers
73 views

Detect connections along shapefile in QGIS?

I have a set of polylines and a set of points that lie along or very near to the polylines, and I need a way to measure which points are connected to each other along the polylines, and what the ...
5
votes
2answers
1k views

Exporting DEM-derived rasters to CSV from QGIS?

I have been able to import into QGIS a set of raster topographic maps and the associated DEM raster maps. It registered the two for me. From there I have calculated the associated slope raster map. ...
1
vote
1answer
72 views

Is it possible to get the style of a tab file I open in QGIS?

I'm trying to duplicate a map made in mapinfo pro with QGIS in order to create shp files for geoserver. When opening the tabs in QGIS they get some random style instead the one defined in mapinfo pro. ...
3
votes
1answer
172 views

How do I set labels to not be one over the other?

In certain zoom I see many city labels "written" on each other. I know there is a feature that set to auto hide labels that override each other ( and I'm not talking about rendering from specific ...
6
votes
3answers
3k views

How to make transparent the background of a topographic map in QGis 1.8.0?

I'm starting to use QGis 1.8.0. I have a raster topographic map, i.e. white background and black contour lines, houses, roads and so on. I want to make transparent the white background, so if I ...
1
vote
0answers
30 views

How do I set label to rotate with segment in QGIS? [duplicate]

Possible Duplicate: How to create curved labels in QGIS In MapInfo Pro I have an option to rotate a label with segment (this is nice for labeling roads for example). How do I do the same ...
2
votes
1answer
1k views

How to get $length in meters in QGIS?

I read a lot of posts concerning that subject, nevertheless I cannot solve to problem of getting $length in the field calculator in meters rather than in decimal degress in QGIS. The CRS of original ...
1
vote
1answer
390 views

How to add rasters of different sizes with Arcmap or Qgis raster calculators?

I've got 8 rasters all of different sizes. What is the proper syntax, for the raster calculators of either Arcmap or Qgis, that will output a raster that covers the extent of all my data not just the ...
3
votes
0answers
204 views

QGIS: GPS Tracking with improved Altitude

I am preparing for archeological fieldwork in Sudan. I recently came up with RTK equipment and software using RTKlib to export the real time corrected data (cm level) to QGIS via a simulated NMEA ...
0
votes
1answer
548 views

How to get Esri *.gdb file into QGIS on Mac?

I have tried the above options, but not being too computer savy, some I didnt get. I tried the homebrew option, but terminal says an error occurs when trying to install. I need this 1 file for a work ...
2
votes
1answer
142 views

QGIS 1.8 compiled against PyQt 4.8+?

I'm currently running QGIS on Win7 64bit. My installation says it was compiled against and running against PyQt 4.7.1, although according to the Osgeo4W installer and PyQt4.QtCore.PYQT_VERSION_STR, I ...
1
vote
2answers
1k views

How to change encoding of layer? [closed]

After loading a point layer out of a text file (plug in add delimited text layer) saved in ISO 8859-15 (Latin 9) out of Access, I did save the layer under Qgis 1.8 with the ISO 8859-15 encoding. When ...
8
votes
1answer
5k views

Create a csv with geometry as WKT in QGIS (and choosing the field delimiter)

Is there a way to choose the field delimiter when exporting to CSV with geometry as wkt in QGIS? I have a shapefile with donut holes and I'd like to export it as a CSV. It's for a partner whose DB ...
1
vote
1answer
514 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 ...
2
votes
1answer
172 views

How to make labels' size relative to the map in QGIS1.8?

I want to make my labels' size changed automatically with the scale of the map,so in the menu of "Layer labeling settings",I set the Text size" in map Unit".However,the labels in the selected layer ...
2
votes
1answer
501 views

How to georeference using Latitude and longitude in QGIS?

I'm trying to georeference a picture using Latitude and longitude. The points are these: top-left: (116.30950927734372,39.970805680527725) top-right: (116.35620117187497,39.970805680527725) ...
7
votes
1answer
2k views

Are there QGIS tools that will allow users to get tabular statistics from their table?

Are there QGIS tools that will allow users to get tabular statistics from their table? I kind of expected I would be able to just open the table, select the field I was interested in, right-click on ...
3
votes
2answers
624 views

Why does QGIS crash when merging shapefiles?

This is a repeatable problem. I have created a shapefile using a csv. I am trying to merge it with an existing shapefile, both of which contain only points. (Using the Vector | Data Management | Merge ...
2
votes
1answer
982 views

QGIS: On the fly projection from WGS84, 19 N, to Web Mercator. Do I need to define a new CRS with transformation parameters?

Workin in QGIS, I have a shapefile called "protected areas" of Dominican Republic, that was digitized from topomaps 50k. Shapefile is projected to WGS84, 19N zone. My problem is that when I load ...
3
votes
1answer
134 views

Import CSV: Is there a cap for number of row

I am trying to import several CSV files which contain more than 1,000 rows respectively. However, but only 129 records were only imported each file. Can't see any options that deal with this? I am ...
1
vote
0answers
166 views

Issues with building a VRT. from OS map tiles in QGIS

I am trying to speed up rendering of OS raster map tiles in QGIS. The tiles are 1:10k Tiffs - about 130 of them. When I attempt to build the VRT it says complete, then it shows up an error ...
2
votes
2answers
551 views

Georeference information stored in tfwx (from ArcGIS). Is it possible to see the georeference in QGIS?

I have georeferenced some images (ArcGIS -> Update Georeferencing) which creates a *.tfwx file with the new parameters for georeferencing. I renamed it to *.tfw but QGIS is not able to read the ...
1
vote
1answer
442 views

How to hide/show QGisVectorLayer from Python code?

Once created a layer, how can I hide/show it? I can enable/disable rendering of a specific layer by selecting the checkbox through QGIS, but I need to do it programmatically from python code. How can ...
1
vote
2answers
95 views

How to draw a closed line in QGIS1.8?

I want to draw a closed line in QGIS1.8,but I don't know how to make the last point coincide with the first point.What am I supposed to do?
1
vote
2answers
1k views

How to fix QGIS PyQGIS package?

I have a broken package that is preventing QGIS from loading python plugins, updating itself, or even un-installing. The main symptom of this problem is the following message that appears when QGIS ...
1
vote
3answers
408 views

Scripting (with) WPS?

As far as I understand WPS (web processing service) can be used to execute geospatial operations on the server side. Is it possible to create scripts with WPS? For example something like: 'check in ...
1
vote
2answers
166 views

information from a shapefile to another shapefile

I am very new to GIS and learning by myself so what I'm about to ask is possibly quite basic. I am using QGIS. I have a shapefile, which categorizes areas (land cover) by numbers (corresponding to ...
5
votes
2answers
515 views

How to recreate unique reference number with QGIS or PostGIS?

I have a shp file with about 500 odd records in it. It has an ID field but I want to add in a new field with a unique reference number. Can I use the field calculator to generate a unique reference? ...
3
votes
1answer
77 views

Is it possible to create DEMs from ORT format in QGIS?

I recently requested DEMs for my area of interest. The data has however arrived in ORT file format - how do I create DEMs from this data in QGIS? When I open the files in Notepad there are three ...
3
votes
1answer
239 views

How to emulate the modulo operator in a style rule?

I have SHP layer loaded in QGIS. It consists of lines with attribute column z, containing integer value associated with line elevation in meters. Lines are drawn at 10 meter increment, and I want to ...
4
votes
1answer
4k views

How to do a simple find and replace in QGIS field calculator?

I'm trying to replace selected string values in an attribute table, eg. "Text1" for "Text2" (QGIS 1.8.0), patriculary for those rows with NULL values. I have been trying to use the replace expression ...
0
votes
2answers
150 views

Why does a track point layer attribute table have no positional information?

I imported a track log in GPX format to QGIS. The track had two layers, the track points and the track, a smooth line joining the track points. Why does the attribute table for the track points have ...
3
votes
1answer
2k views

Import GPX file to QGIS and correct apparent CRS problems

I am using Easy Trails software on an iPhone to output a gpx file of a walk. When I import the file (import vector layer) to QGIS, into a project with OSGB information and the correct CRS for OSGB ...
1
vote
1answer
374 views

How to convert images from the South African co-ordinate system to WGS84 lat/long?

I have a number of orthophotos for an area in South Africa, but they are projected in the South African co-ordinate system which measures a location in meters from a central (uneven) meridian. These ...
4
votes
3answers
1k views

What's the easiest way (style wise) to publish my MapInfo map as WMS?

I've downloaded data for my country from OSM and let a GIS expert to style it for me in MapInfo pro. (I have TAB files and .wor - workspace). When I tried converting them to SHP (for QGIS) I've ...