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

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19 views

No fetch Python plugins in qgis 1.8 + ubuntu 13.04 [duplicate]

I tried to install qgis 1.8 to ubuntu 13.04 but when installation finished I couldn't find "Fetch python plugin" button in plugin menu. I didn't find any soloution for this problem. Any idea what's ...
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0answers
467 views

How to fill in the parameters for kernel density estimation?

I am desperately trying to calculate animals home range with kernel. Unfortunately, the result is obviously incorrect and I cannot identify my mistake (I would like to post a screenshot but its not ...
1
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1answer
85 views

Why is my custom QGIS repository not working in recent qgis-dev version?

I have a custom QGIS repository that worked well with my own plugins.xml on a private server. Yesterday I downloaded and installed the newest QGIS-DEV that now include some changes in the Python ...
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1answer
221 views

Failed connection with .sqlite file in QGIS converted from osm by spatialite

I have converted a *.osm file to a *.sqlite file using the spatialite_tool i.e sspatialite_osm_map.. Now I want to view the map using QGIS. However, at the time of using the add spatialite table ...
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0answers
328 views

How to load the default layer style from Postgresql with Python?

I would like to write a python macro that upon opening my QGIS project file will reload the default style for each layer from the postgres 'layer_style' table. I have had a look at the documentation ...
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2answers
976 views

How to draw a Circle of fixed radius in QGIS using QgsMapCanvasItem?

I have derived a class from QgsMapCanvasItem for drawing circle of some radius at a given latitude and longitude. In my paint function I am using QPainter to draw the circle as void paint (QPainter* ...
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0answers
174 views

Specify formatting of floating point numbers in QGIS labels?

Is there a way to specify the format used with floating point numbers used as labels in QGIS? By default they print with a large number of digits after the decimal place but I would like to specify ...
3
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3answers
20k views

How to convert x y coordinates to longitude latitude using QuantumGIS?

I'm working with this downloadable shapefile that has X Y coordinates. They are akin to '3672187.92698000, 534175.72095400'. I would like to convert them to longitude latitude so they are more like ...
2
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1answer
140 views

QGIS link values longer than the links?

Can you please help me to correct link rapresentation when the thickness exceed the links. In the image you can see the value on two consecutive links that generate a bad view. I think it depends on ...
3
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1answer
960 views

Can one convert text annotations to a layer in Qgis?

I know text annotations can be turned on & off with Ctrl+T... but is there any way to export them as a layer? Thanks!
5
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1answer
2k views

Is it possible to use DotNet to show a QGIS map?

Has anybody ever tried to show and interact with a QGIS map from a DotNet language like C#? What i have in mind is, to write a desktop application with C#, and show an embedded map with the QGIS-API ...
3
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1answer
333 views

QGIS: plotting real time lat/lon GPS input on a different projection

I'm trying to plot realtime GPS over a satellite image in QGIS 1.8. The GPS data is coming in as NMEA lat/lon from a Garmin Etrex. This works when the image is in WGS84 lat/lon projection and ...
4
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1answer
174 views

How to avoid cutting labels along the map border?

I am labeling areas on a map (for example, forest (coniferous, deciduous trees), swampland, and so on). A cartographer has criticized it because labels which extend beyond the boundaries of the ...
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1answer
624 views

Reverse geocoding polygon co-ordinates?

I have a large dataset of polygons for property sections that I need to reverse geocode. It was recommended that I use a GIS like Quantam to do this however from my research I am not 100% sure if a ...
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0answers
550 views

calculating home ranges with QGIS [closed]

i am facing some problems when trying to calculate animals home ranges with QGIS 1.8.0. One the one hand, when trying to calculate MCP with the Home range plugin, i get error messages. on the other ...
2
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1answer
414 views

Orthophoto in QGIS to georeference for use in Sketchup 8, or how to match it with Sketchup 8 pictures?

I have a high resolution orthophoto of an area I want to rebuild in sketchup and therefore want to lign it up (georeference it properly), but all the scaling and everything I tried so far did not help ...
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0answers
229 views

problems with r.sun from GRASS

I´ve problems with r.sun from GRASS. I need to calculate beam radiation, reflect radiation and diffuse radiation wwith this tool. my problem is I do not understand that you have to put mandatory files ...
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0answers
1k views

Add x y data from existing attribute table

In Quantum GIS, I already imported an excel or dbf table. Now I need to tell Quantum GIS which columns are Latitude and Longitude. How do I do that? I know there is Add Delimited Text Layer which ...
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0answers
384 views

Install shapely for QGIS on Mac

I know there are a number of similar questions, but none of them have answers that allow me to use shapely in QGIS. In particular I am trying to install the Contour plugin, but this fails with the ...
2
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0answers
76 views

How to run an external program on “identify” on a WMS layer?

I have a QuantumGIS project with several WMS layers. When I select one of these, the identify-function shows a windows with more information on the feature I clicked. It gets this data from the ...
2
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3answers
4k views

How to open an ArcGIS Desktop .lpk file using QGIS on a Mac?

I downloaded an LPK file from the ESRI site that contains USPS defined zip codes. Because I'm working with QGIS on a Mac, I converted the file to a .zip. There's a .lyr file that opened up in the zip, ...
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1answer
358 views

What do I need to do to add a new QGIS project to qgis-web-client?

for weeks I'm trying to get QGIS Server with qgis-web-client to work but I'm totally stuck. System is Debian Squeeze. In principle, I get QGIS Server and the qgis-web-client up and running: it's ...
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1answer
331 views

qgis field calculator - changing datatype

I have seen a solution that I don't get to work - I need to change data type from string to integer and I did what is shown i the image below Can someone point out what I do wrong? thx Jan
3
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1answer
422 views

Multiple text formats in a qgis label [duplicate]

Is there any way to have multiple text formats in a single qgis label? I am making a map that shows mountain summits. Many of these summits have more than one name and I would like to show each name ...
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2answers
205 views

How to modify the results of a geological dataset from vertical to horizontal?

I have a 3-D point shapefile of a geological fault dataset consisting of x,y, and z columns. I need to create a raster dataset from this point dataset. I have been trying to do this in ArcGIS; ...
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2answers
703 views

QGIS 1.8 python refresh maps

i have developed this plugin .. all works fine but the map wont get refreshed . here is code vectorCount =0 mpointCount=0 mlineCount=0 mpolygonCount=0 mrasterCount=0 mlegnd = ...
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2answers
479 views

Where to find the variables of QgsPolygon and QgsPolyline?

now I want to use QgsPolygon (and Qgspolyline,too) class in python I have a example by using QgsPoint but I don't know how to use in QgsPolygon following is my Qgspoint example feature = ...
3
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0answers
327 views

When will QGIS version 2 be available? [closed]

Just wondering, how close is the public release of version 2? I do realise that I can download 1.9, but was wondering about the public version.
2
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1answer
102 views

How to split complex lines?

I want to edit some complex polylines, which I imported from my GPS. These polylines have many vertices and are selfintersecting many times. When I try to split these lines using the 'Split ...
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3answers
3k views

Saving of multipolygon shape file into a individual polygon shape files [closed]

How to seperate a multi polygon shape file into individual polygons(as seperate shape files)? i had huge data... I know the traditional process like export data... Please help me.. Thanks in Advance
1
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1answer
600 views

How to create a 4 band image from an RGB and a grey scale image?

I have an RGB image and a Gray scale image. I would like to merge them in a 4 bands image. How can I do that? Is there a simple way to do it from QGIS or I have to modify the image before to load them ...
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2answers
1k views

How to fix OpenLayers plugin for QGIS Master?

I can't get the OpenLayers plugin to work in QGIS Master (1.9), I loaded the repository successfully, but the plugin doesn't come up as an option anywhere. I'm new to this, but have tried to make ...
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0answers
140 views

QGIS 1.9 problem with setGrayBandName on the QgsRasterLayer

I have installed the developer version of QGIS on my computer in order to do some work with a multiband raster file. The file consists of 30 bands of information, and I need to step through it with a ...
0
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1answer
333 views

Why postgis st_overlaps reports Qgis' “avoid intersections” generated polygon as overlapping with others?

I am implementing a postgis trigger on polygon layer to check and reject newly created polygon if it overlaps others. The problem shows when I digitize new polygons adjacent to others in Quantum GIS ...
0
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1answer
221 views

How to symbolize features in QGIS?

Why is a shapefile shown as coloured independent features in ArcGIS shown in a single colour in Quantum GIS? What can I do to display this layer (wwf ecoregions) with the different ecoregions ...
4
votes
1answer
109 views

Why are raster z-values changed when reprojecting?

I have raster data with height values (z). When I try to reproject/warp the raster to Gauss Kruger 3, the z-values are changing (several meters). (The data is already GK3, but I have to reproject ...
5
votes
1answer
868 views

How can I create a new layer from the currrent selection?

Is it possible to create a duplicate layer, only displaying the selection from the layer you are duplicating in QuantumGIS? Simular to ArcGIS -> Create Layer from Selected Features. I looked at "How ...
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2answers
71 views

Discontinuous elevation contours at boundary of CanVec datasets

I am using Quantum GIS and I am working with the elevation contours from two adjacent CanVec datasets. The problem is that many of the contours' endpoints at the shared boundary do not coincide with ...
3
votes
1answer
392 views

Why doesn't the Kernel Density Estimate function appear in AniMove plugin?

can anyone tell me why the Kernel Density Estimate function does not appear under my AniMove plugin in QGIS? I can only perform the MCP. I run Windows OS.
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0answers
22 views

Shapefile is not a valid or recognised data source. [duplicate]

I have some shapefiles that I have been using before, some months back, but now I try to load them into QGIS but I get the message: districts.shp is not a valid or recognised data source. I realise ...
5
votes
1answer
2k views

How to open File Geodatabase in QGIS (Ubuntu)?

So far I have found instructions on stack exchange but they are for windows. And so far the information I have found is for windows. I currently have Ubuntu 13.04 Raring tail. I am using qgis 1.8. I ...
11
votes
1answer
2k views

How to create desire lines in QGIS?

How can I show the flow coming from an Origin-Destination matrix as desire lines? I need a result like the one in the picture below. I need to scale them proportionally to its value (coming from a ...
4
votes
1answer
516 views

Experiencing transformation anomalies when performing a Save As to convert coordinates between NAD83-Z14 and NAD27-Z13

Good morning all: I have recently discovered QGIS and have been hoping to find a solution for converting bacthes of xy coordinates between two projection systems for our mapping system. I have known ...
1
vote
1answer
481 views

JSON URL won't open in QGIS

When attempting to display the national chargepoint registry from the following URL: http://chargepoints.dft.gov.uk/api/retrieve/registry/format/json The following error returns: ...
1
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1answer
288 views

QGIS offset dash line style - dash spacing does not vary with rotation

I'd like to make a USGS-style dirt road marker but with smaller dashes and bigger spacings (i.e. less duty cycle) to indicate lower quality road. First attempt = two simple lines, custom dashes of ...
1
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1answer
251 views

Combine shape in folder for on/off

Is it possible to organize some shapes into folders to turn on/off all the shape togheter? Is it useful for the shape that you can punt at the top/bottom of a project.
4
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1answer
1k views

How to make the thickness of traffic volume flow symbology proportional to traffic counts?

I can scale the bandwidth proportionally to the traffic volumes; however, I cannot show the directionality of the movements. Volumes for directional moves are stored in two different columns of a ...
3
votes
1answer
276 views

How to represent Typhoon(s) wind speed using Quantum GIS / PostGIS?

I am not completly new to GIS (was taught ArcGIS at Uni) but I would still consider myself (especially compared to all these experts here) a newbie in QGIS or PostGIS. I want to display the ...
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1answer
76 views

How to search for text in QGIS?

Does QGIS have any search capability, for example to find text within cadastral polygons? Quantum gis posee algun buscador , por ejemplo para identificar textos en poligonos de catastro ?
2
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1answer
343 views

ImportError: No module named qgis.core

I am on Ubuntu 13.04. I get the following error message - Traceback (most recent call last): File "analyse.py", line 1, in <module> from log import shelve File ...