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

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loss of attribute data when copying between layers

I am trying to copy points from one layer to another in QGIS 2.2 The problem I get is that all the attribute data from the copied points is missing when copied onto the new layer, the columns show ...
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1answer
24 views

In QGIS are there similare construction tools to ArcGIS?

For a project we are using ArcGIS to reshape autogenerated features. For that we often use the construction tools polygon, rectangel, circle, etc in ArcGIS. The right angle is also an often used tool. ...
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8 views

QGIS for Android - installation with QGIS-Installer faild on Galaxy Note 10.1 LTE

I once installed QGIS for Android. After deinstallation i'm not able to reinstall QGIS on my Galaxy Note 10.1 LTE. I've enabled App installation from unknown sources! Any ideas where the problem ...
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1answer
35 views

How to go with…somewhat complex geological maps in QGIS?

Just a follow-up to this question QGIS: Line to polygon conversion. Not sure do i have to continue there itself... We are currently digitizing a geological map...which has 36 features in total. Some ...
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2answers
111 views

Needed shape file for Australia and New zealand

I was trying to find a shape file which has Australia and New zealand together(states) so that i could convert to jvectormap for ANZ. where i can find it?
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25 views

finding orientation -direction of polygon

i have one polygon layer and another is point layer,i want to findout orientation automatically of line of polygon which is parellel to the street and closest to the point.i am using Qgis 2.0 .is it ...
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3 views

Problems rendering tilestache served mbtiles in QGIS

I came across Geoffery Hing's walk through on using Tilestache to serve up mbtiles to QGIS. I followed the configuration and I was able to view tiles in the browser without any problems. However, when ...
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1answer
11 views

Trouble Using Selection Expression in QGIS

I am trying to use the selection expression box to highlight counties by state FIPS. When I use the OR conditional all counties across the US get highlighted. So for example, STATEFIPS = 1 will ...
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21 views

Convert coordinates

I have some data that I need to convert to Lat-Lon in order to plot. It originally came from an Esri Shapefile which I managed to get it out of with QIS. The issue is that the coordinate reference ...
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2 views

error (407) Proxy Authentication Required plugins mmqgis e geocoder Qgis

By using Geocoder plugins and mmqgis QGIS to geocode some addresses using Google the error (407) Proxy Authentication Required occurs. I entered the settings and put the QGIS network address, User ...
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2answers
33 views

How to I convert from decimal degrees to meters in Qgis?

I am trying to convert from decimal degrees to meters in QGIS. I have a shape file that is currently in WGS84/UTM zone 19S. I have tried the save as - browse - WGS84 EPSG:4326 but this appears: ...
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20 views

How do you calculate the area of polygons which overlap a buffer around a point?

I'm new to QGIS (Dufour 2.0.1) and have plotted nests as points on a googlemaps base-map and have created buffer zones around the nests. I've also plotted ponds as polygons on the same base-map. I ...
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14 views

How to split apart overlapping features

I have a set of 20 features that are the exact same shape (a rectangle) that are stacked on top of one another in qGIS. Is there a way to programmatically separate them? Ideally I'd like to separate ...
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8 views

QGIS 2.2 freezes when I select a Grass command via Processing toolbox

I'm on Ubuntu 13.10, and I have never been able to get the Grass plugin to work in QGIS 2.2 via the Processing toolbox. As soon as I select any Grass command, QGIS locks up, no menu appears. I then ...
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16 views

I'm looking for an idea to calculate shortest path in a line Vector layer using a starting point

I'm looking for an idea to calculate shortest path time in a line Vector layer using a starting point in a qgis python plugin based on distance and speed. is there a solution where i can get ideas? ...
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12 views

QgsGeometryAnalyzer.dissolve problems

I am completely new to the QGIS python api and I am running into an error which I cannot solve when trying to use the dissolve class. I used the basics of the PyQGIS Cookbook. In my understanding ...
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1answer
35 views

How can i create a link to a whole folder?

I know how to create a hyperlink to a single pdf-file: Create a hyperlink to a pdf file in the attribute table But now I want to make a link to a folder with 3 or 4 pdf files in it. Is that possible? ...
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1answer
32 views

QGIS: Line to polygon conversion

Currently we are working in a geological project..in which all the Contacts, Linear & some other geological features have to be captured. The thing is most of the features have to be Captured as ...
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2answers
17 views

Problems building QGIS 1.8.0

I am very new to QGIS (and the entire Linux thing). I am trying to build QGIS 1.8 on ubuntu 12.04LTS. I specifically need to use the 1.8 version of QGIS. When running the "make" command, I see the ...
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32 views

How to convert this data to LatLongs? [on hold]

We have data like Number of pixels 2589, X position 359 Y position 606, and area computed as 2.217411. How to convert this data to LatLongs? it should ...
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28 views

Writing a script for accessing QGIS tools for use in HTML WebPage

My objective is to write a script which uses QGIS GRASS Plugin tools and generates an IDW Interpolation Output and passes the file path as a parameter, which can be used in an OpenLayers API ...
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28 views

Looking for QGIS 2.0.1 [duplicate]

So I deleted my old version of QGIS Dufour (2.0.1) with the intention of replacing it with the new version (2.2). It wasn't until I deleted my old version that I realized my Mac OS 10.6.8 is not ...
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17 views

custom toolbar combobox: issues with adding functionality

I've added a combo box to my custom toolbar in QGIS (based on this thread QGIS - Add a combobox to a toolbar), but it doesn't populate unless I reload the plugin. def __init__(self, iface): ... ...
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13 views

Can't see html file on my computer when trying to create an html annotation

I am using QGIS 2.0.1 on my Windows 7 operating system. I want to create an html annotation. I have created an html file on Microsoft Word 2010 by creating the document and then saving it as a "Web ...
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17 views

Chopping vector polygons

I am a Global Mapper user. In GM we have a function to chop polygons with holes in it. Is there such function in QGis? If yes, is it available via script? I am totally new to QGis so I would ...
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1answer
23 views

GRASS 6.4.3 installed with QGIS not working

I'm new to QGIS and GRASS. I'm trying to do an image classification and it seems that the method I need is not within the GRASS toolbox in the QGIS . So I decided to use the standalone GRASS version ...
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24 views

How can I create/draw “freehand” polygon features in QGIS 2.2?

I installed the Freehand Editing plugin but it doesn't seem to work with the latest version of QGIS; the icon appears on the Ditizing Toolbar but the icon is disabled. Is there any way to use a ...
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2answers
39 views

Convert from Julian Date to Calender Date in Field Calculator

Does anyone know of a way to convert from a Julian date to a regular calender date in either QGIS or ArcGIS field calculator? Thanks...
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1answer
21 views

Unknown error concurring when developing QGIS 2.0.1 plugin in Windows 7

I am following the tutorial found here for developing a simple QGIS plugin within QGIS 2.0.1 installed on Windows 7. However, as I have began to try developing a link between the GUI and each the ...
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1answer
24 views

Extract Longitude and Latitude from Geotiff (ASTER 30m DEM)

my problem is apparently quite simple, but I cannot really find an easy answer: in QGIS I've created a raster layer by merging different GeoTiff images from the ASTER 30m DEM dataset. The merging is ...
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0answers
14 views

QGis Zonal statistics error

I'm trying to use the processing zonal statistics tool. I just have one raster and one vector layer. The Log says always: Algorithm Zonal Statistics starting... 'NoneType' object has no ...
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0answers
36 views

How to clip polygons within buffer using QGIS?

I am trying to do the clip operation with polygons in the buffer, so far I'm getting no results. It is working for points in the buffer. Am I doing anything wrong? Basicly I'd like to include ...
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1answer
16 views

RasterStack extract() for duplicated dates

I have a a Large RasterStack of temperatures and a 10570 points in a Large SpatialPointsDataFrame and I'm using extract() to assign the temperatures to each point in R. ...
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0answers
22 views

Snapping issue in QGIS

I had drafted a polyline with QGIS, I want to continue that line with snapping from it's end, but snapping is not working in starting, after starting I am getting snapping. Using windowsXp and Q gis ...
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20 views

How to intersect more than 2 layers in QGIS

I have a dozen layers, some intersecting with others. Using the Intersect tool only allows 2 layers at a time but can you add extra layers to find where it intersects? Even if it's 3 layers as shown ...
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14 views

Crash upon heatmap

I am completely new to qgis. I am trying to generate some heatmaps from crime data... and failing miserably. I have tried with my own data and the data in the heatmap guide here ...
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17 views

QGIS 2.2 - Opening ArcPad *.tif.aux *.tif.sdw *.tif.sid

I use QGIS 2.2 with Ubuntu Linux and with Windows 7. Under Win7 I can open the ArcPad data without problems. The browser find it and I can add this data in a layer. Under Ubuntu the browser cannot ...
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0answers
12 views

can not delete file after using runalg function

I my plugin I use the runalg function: processing.runalg("qgis:clip",filepath + "/temp2.shp", Layer, filepath + '/' + layerName) vlayer = QgsVectorLayer(filepath + '/' + layerName + '.shp',layerName, ...
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1answer
24 views

How to export a IDW raster while keeping the search radius data

I want to export my IDW rasters that I made in ArcGIS to QGIS, however when I export my raster, the values are there but are no longer displayed. They are stored within each cell and are not ...
3
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1answer
23 views

writeOGR column limit error: “Creating Name field failed”

I have a SpatialPointsDataFrame with 1057 elements and 4760 columns and want to export it to a shapefile. When I try to do this with writeOGR() I get an error: > ...
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1answer
22 views

Save as .csv with coordinates in both QGIS 2.2 and PyqGIS

These questions have been asked before, but since they are not answered I will try to pick up the ends here. 1) First, as stated here: QGIS 2.2 saving layer as CSV with GEOMETRY=AS_WKT not working ...
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1answer
36 views

How to make river lines intact between confluences in QGIS?

I got a river shapefile below, and I found that there are many fragmental lines in this line shapefile, like, and, Most of these are located around the confluence(node), and how can I do to ...
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0answers
15 views

QgsMarkerSymbolLayerV2 not rendering

For the life of me I cannot get a custom vector layer symbol to render. Following is the code I am using, as fas as I can tell renderPoint is never called. Is there something I am missing here. The ...
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0answers
14 views

How to translate .bil files in a batch mode with QGIS?

I have some .bil files that I would like to convert into ASCII Gridded XYZ format files. It seems to work well with the Raster>Translate tool of QGIS when I process one file at a time. But I would ...
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1answer
19 views

Planar CRS for raster and vector layers

I want to work with a planar coordinate system, and as far as I know QGIS automatically puts me in a cartesian plan if I don't set up a CRS (Coordinate Reference System) for my project. That is ...
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21 views

How to open a raw binary raster in QGIS or R

I have a raw binary raster without a file ending, and no header file. I would like to open this in either QGIS or R and then convert to geotiff, but opening it seems to be a challenge. Here is a ...
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2answers
21 views

merging shapefiles . an error occured during the merge operation

i am trying to merge multiple polygons of a feature. i select them via select features by polygon and use the advanced digitalizing toolbar " merge selected features" option. it worked for some but ...
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5 views

qgis - problem importing raster grid from GMRT

I am importing a .asc file into QGIS when doing so a window pops up saying that I need to define the layers coordinate system which is set on default WGS: 84 and the authority ID is EPSG: 4326. The ...
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0answers
9 views

QGIS - Select points from shapefile where field value equals value in another shapefile

I have a line shapefile and extracted its nodes to a point shapefile, where all features have the FID of original line. After that, I've broken the point in two groups, exported to different shapes. ...
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12 views

Layer offset issue in QGIS 2.0.1

I have two loaded WMS layer and want to change their position relative to each other. First, I tried to use Layer class and write some kind of plugin, but I can't find any method that allow to change ...